cfr_sections
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73 rows where agency = "USCG" and part_number = 174 sorted by section_id
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| section_id ▼ | title_number | title_name | chapter | subchapter | part_number | part_name | subpart | subpart_name | section_number | section_heading | agency | authority | source_citation | amendment_citations | full_text |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 33:33:2.0.1.8.38.1.228.1 | 33 | Navigation and Navigable Waters | I | S | 174 | PART 174—STATE NUMBERING AND CASUALTY REPORTING SYSTEMS | A | Subpart A—General | § 174.1 Applicability; preemptive effect. | USCG | [USCG-2003-14963, 77 FR 18701, Mar. 28, 2012] | This part establishes a standard numbering system for vessels and a uniform vessel casualty reporting system for vessels by prescribing requirements applicable to the States for the approval of State numbering systems. The regulations in subparts A, B, and D of this part have preemptive effect over conflicting State or local regulation. The regulations in subpart C of this part have preemptive effect over State or local regulation within the same field, except to the extent that Congress requires the Coast Guard to allow State casualty reporting systems pursuant to 46 U.S.C. chapter 131. | |||
| 33:33:2.0.1.8.38.1.228.2 | 33 | Navigation and Navigable Waters | I | S | 174 | PART 174—STATE NUMBERING AND CASUALTY REPORTING SYSTEMS | A | Subpart A—General | § 174.3 Definitions. | USCG | [USCG-2003-14963, 77 FR 18701, Mar. 28, 2012] | As used in this part— Airboat means a vessel that is typically flat-bottomed and propelled by an aircraft-type propeller powered by an engine. Auxiliary sail means a vessel with sail as its primary method of propulsion and mechanical propulsion as its secondary method. Cabin motorboat means a vessel propelled by propulsion machinery and providing enclosed spaces inside its structure. Certificate of number means the certificate required by 33 CFR 173.21. Charter fishing means a vessel carrying a passenger(s) for hire who is (are) engaged in recreational fishing. Commercial fishing means a vessel that commercially engages in the catching, taking, or harvesting of fish which, either in whole or in part, is intended to enter commerce through sale, barter, or trade. Houseboat means a motorized vessel that is usually non-planing and designed primarily for multi-purpose accommodation spaces with low freeboard and little or no foredeck or cockpit. Hull identification number or HIN means a number required by 33 CFR 181.23. Inboard, in the context of an engine, means an engine mounted inside the confines of a vessel which powers a drive shaft that turns a water jet impeller or that runs through the bottom of the hull and is attached to a propeller at the other end. Inflatable boat means a vessel that uses air-filled flexible fabric for buoyancy. Open motorboat means a vessel equipped with propulsion machinery and having an open load carrying area that does not have a continuous deck to protect it from the entry of water. Operate means use, navigate, or employ. Operator means the person who is in control or in charge of a vessel while it is in operation. Outboard, in the context of an engine, means an engine with propeller or water jet integrally attached, which is usually mounted at the stern of a vessel. Owner means a person, other than a secured party, having property rights in or title to a vessel, including persons entitled to use or possess a vessel subject to a security interest in ano… | |||
| 33:33:2.0.1.8.38.1.228.3 | 33 | Navigation and Navigable Waters | I | S | 174 | PART 174—STATE NUMBERING AND CASUALTY REPORTING SYSTEMS | A | Subpart A—General | § 174.5 Requirements for approval. | USCG | [CGD 97-023, 62 FR 33365, June 19, 1997, as amended by USCG-1998-3799, 63 FR 35533, June 30, 1998; USCG-2003-15404, 68 FR 37742, June 25, 2003] | The Commandant approves a State numbering system if he or she finds, after examination of the information submitted by a State, that the State numbering system and vessel casualty reporting system meet the requirements of this part, 46 U.S.C. 6102, and 46 U.S.C. Chapter 123. | |||
| 33:33:2.0.1.8.38.1.228.4 | 33 | Navigation and Navigable Waters | I | S | 174 | PART 174—STATE NUMBERING AND CASUALTY REPORTING SYSTEMS | A | Subpart A—General | § 174.7 Approval procedure. | USCG | [CGD 72-54R, 37 FR 21402, Oct. 7, 1972, as amended by CGD 82-010, 48 FR 8273, Feb. 28, 1983; CGD 88-052, 53 FR 25122, July 1, 1988; CGD 96-026, 61 FR 33669, June 28, 1996; USCG-2008-0179, 73 FR 35024, June 19, 2008; USCG-2010-0351, 75 FR 36287, June 25, 2010; USCG-2014-0410, 79 FR 38448, July 7, 2014] | To obtain approval by the Commandant of a numbering system or of any revision to a numbering system, an authorized representative of the State must submit three copies of the State laws, regulations, forms, and policy statements, if any, that pertain to the numbering system or revision to Commandant (CG-BSX), Attn: Office of Auxiliary and Boating Safety, U.S. Coast Guard Stop 7501, 2703 Martin Luther King Jr. Avenue SE., Washington, DC 20593-7501. | |||
| 33:33:2.0.1.8.38.2.228.1 | 33 | Navigation and Navigable Waters | I | S | 174 | PART 174—STATE NUMBERING AND CASUALTY REPORTING SYSTEMS | B | Subpart B—Numbering System Requirements | § 174.11 Applicability of State numbering system. | USCG | (a) Except as allowed in paragraph (c) of this section, a State numbering system must require the numbering of vessels to which § 173.11 of this chapter applies. (b) A State numbering system may require the numbering of any vessel subject to the jurisdiction of the State unless prohibited by the regulations in part 173 of this chapter. (c) A State numbering system may exempt from its numbering requirements any vessel or class of vessels to which § 173.13 of this chapter applies. | ||||
| 33:33:2.0.1.8.38.2.228.10 | 33 | Navigation and Navigable Waters | I | S | 174 | PART 174—STATE NUMBERING AND CASUALTY REPORTING SYSTEMS | B | Subpart B—Numbering System Requirements | § 174.25 Size of certificate of number. | USCG | [89 FR 47963, June 4, 2024] | Each certificate of number must be in hard copy or digital form. Any certificate issued in hard copy under this section must be pocketsized. | |||
| 33:33:2.0.1.8.38.2.228.11 | 33 | Navigation and Navigable Waters | I | S | 174 | PART 174—STATE NUMBERING AND CASUALTY REPORTING SYSTEMS | B | Subpart B—Numbering System Requirements | § 174.27 Duration of certificate of number. | USCG | A certificate of number must not be valid for more than 3 years. | ||||
| 33:33:2.0.1.8.38.2.228.12 | 33 | Navigation and Navigable Waters | I | S | 174 | PART 174—STATE NUMBERING AND CASUALTY REPORTING SYSTEMS | B | Subpart B—Numbering System Requirements | § 174.29 Temporary certificate of number. | USCG | A State may issue a temporary certificate of number that is effective for not more than 60 days. | ||||
| 33:33:2.0.1.8.38.2.228.13 | 33 | Navigation and Navigable Waters | I | S | 174 | PART 174—STATE NUMBERING AND CASUALTY REPORTING SYSTEMS | B | Subpart B—Numbering System Requirements | § 174.31 Terms imposed by States for numbering of vessels. | USCG | [CGD 72-54R, 37 FR 21402, Oct. 7, 1972, as amended by USCG-2003-15708, 70 FR 13105, Mar. 18, 2005; USCG-2022-0323, 88 FR 10029, Feb. 16, 2023] | A State numbering system may condition the issuance of a certificate of number on— (a) Title to, or other proof of ownership of a vessel except a recreational-type public vessel of the United States; or (b) Proof of liability insurance for a vessel except a recreational-type public vessel of the United States; or (c) Proof of payment of State or local taxes, except for a recreational-type public vessel of the United States. | |||
| 33:33:2.0.1.8.38.2.228.2 | 33 | Navigation and Navigable Waters | I | S | 174 | PART 174—STATE NUMBERING AND CASUALTY REPORTING SYSTEMS | B | Subpart B—Numbering System Requirements | § 174.13 Owner or operator requirements. | USCG | [CGD 77-117, 44 FR 42195, July 19, 1979] | A State numbering system must contain the requirements applicable to an owner or a person operating a vessel that are prescribed in the following sections of part 173: (a) Paragraph (a) of § 173.15 Vessel number required. (b) Section 173.19 Other numbers prohibited. (c) Paragraph (a) of § 173.21 Certificate of number required. (d) Section 173.23 Inspection of certificate. (e) Section 173.25 Location of certificate of number. (f) Section 173.29 Notification of issuing authority. (g) Section 173.71 Application for certificate of number. (h) Section 173.73 Duplicate certificate of number. (i) Section 173.77 Validity of certificate of number. | |||
| 33:33:2.0.1.8.38.2.228.3 | 33 | Navigation and Navigable Waters | I | S | 174 | PART 174—STATE NUMBERING AND CASUALTY REPORTING SYSTEMS | B | Subpart B—Numbering System Requirements | § 174.14 State numbering system optional sections. | USCG | [CGD 77-117, 44 FR 42195, July 19, 1979, as amended by USCG-1999-5832, 64 FR 34715, June 29, 1999] | In addition to the requirements in § 174.13, a State numbering system may contain any of the other requirements applicable to a vessel owner or operator prescribed in part 173. | |||
| 33:33:2.0.1.8.38.2.228.4 | 33 | Navigation and Navigable Waters | I | S | 174 | PART 174—STATE NUMBERING AND CASUALTY REPORTING SYSTEMS | B | Subpart B—Numbering System Requirements | § 174.15 Validation stickers. | USCG | (a) If a State issues validation stickers, its numbering system must contain the requirements that stickers must be displayed within 6 inches of the number and the stickers must meet the requirements in paragraphs (b) and (c) of this section. (b) Validation stickers must be approximately 3 inches square. (c) The year in which each validation sticker expires must be indicated by the colors, blue, international orange, green, and red, in rotation beginning with blue for stickers that expire in 1973. | ||||
| 33:33:2.0.1.8.38.2.228.5 | 33 | Navigation and Navigable Waters | I | S | 174 | PART 174—STATE NUMBERING AND CASUALTY REPORTING SYSTEMS | B | Subpart B—Numbering System Requirements | § 174.16 Verification of hull identification numbers (HINs). | USCG | [USCG-2003-14963, 77 FR 18701, Mar. 28, 2012] | (a) As used in this section, “action” means an action by an issuing authority listed in 33 CFR part 173, appendix A, to issue, renew, or update the ownership information for a certificate of number under this part but does not include the issuance of a temporary certificate under 33 CFR 174.21. (b) As of January 1, 2017, before taking any action relating to a vessel imported or manufactured on or after November 1, 1972, the issuing authority must determine whether the vessel has a primary HIN meeting the requirements of 33 CFR part 181, subpart C. (c) If, pursuant to paragraph (b) of this section, the issuing authority determines that the vessel does not have a primary HIN meeting the requirements of 33 CFR part 181, subpart C, then before taking any action the issuing authority must— (1) Assign such a primary HIN to the vessel; and (2) Verify that the owner of the vessel has permanently affixed the assigned primary HIN to the vessel in compliance with 33 CFR part 181, subpart C. | |||
| 33:33:2.0.1.8.38.2.228.6 | 33 | Navigation and Navigable Waters | I | S | 174 | PART 174—STATE NUMBERING AND CASUALTY REPORTING SYSTEMS | B | Subpart B—Numbering System Requirements | § 174.17 Contents of application for certificate of number. | USCG | [USCG-2003-14963, 77 FR 18702, Mar. 28, 2012, as amended by USCG-2024-1103, 90 FR 52879, Nov. 24, 2025] | (a) An application for a certificate of number must contain the following information: (1) Name of owner. (2) Address of owner, including ZIP code. (3) Owner identifier, which must be the owner's tax identification number, date of birth together with driver's license number, or date of birth together with other unique number. (4) State of principal operation. (5) Number previously issued by an issuing authority. (6) Application type: Authorized terms are “new number”, “renewal of number”, or “transfer of ownership”. (7) Primary operation: Authorized terms are, “charter fishing”, “commercial fishing”, “commercial passenger carrying”, “dealer or manufacturer demonstration”, “other commercial operation”, “pleasure”, or “rent or lease”. (8) Make and model of vessel. (9) Model year. (10) Hull identification number, if any. (11) Overall length of vessel. (12) Vessel type: Authorized terms are “air boat”, “auxiliary sail”, “cabin motorboat”, “houseboat”, “inflatable boat”, “open motorboat”, “paddlecraft”, “personal watercraft”, “pontoon boat”, “rowboat”, “sail only”, or “other”. (13) Hull material: Authorized terms are “aluminum”, “fiberglass”, “plastic”, “rubber/vinyl/canvas”, “steel”, “wood”, or “other”. (14) Propulsion type: Authorized terms are “air thrust”, “manual”, “propeller”, “sail”, “water jet”, or “other”. (15) Engine drive type: Authorized terms are “inboard”, “outboard”, “pod drive”, “sterndrive”, or “other”. (16) Fuel: Authorized terms are “electric”, “diesel”, “gas”, or “other”. (17) Signature of the owner. (b)(1) An application made by a manufacturer or dealer for a number that is to be temporarily affixed to a vessel for demonstration or test purposes may omit the information under paragraphs (a)(9) through (a)(17) of this section. (2) An application made by an owner of a vessel without propulsion machinery may omit the information under paragraphs (a)(16) and (a)(17) of this section. | |||
| 33:33:2.0.1.8.38.2.228.7 | 33 | Navigation and Navigable Waters | I | S | 174 | PART 174—STATE NUMBERING AND CASUALTY REPORTING SYSTEMS | B | Subpart B—Numbering System Requirements | § 174.19 Contents of a certificate of number. | USCG | [USCG-2003-14963, 77 FR 18702, Mar. 28, 2012, as amended by USCG-2024-1103, 90 FR 52879, Nov. 24, 2025] | (a) Except as allowed in paragraph (b) of this section, each certificate of number must contain the following information: (1) Number issued to the vessel. (2) Expiration date of the certificate. (3) State of principal operation. (4) Name of owner. (5) Address of owner, including ZIP code. (6) Primary operation: Authorized terms are, “charter fishing”, “commercial fishing”, “commercial passenger carrying”, “dealer or manufacturer demonstration”, “other commercial operation”, “pleasure”, or “rent or lease”. (7) Hull identification number, if any. (8) Make and model of vessel. (9) Model year. (10) Overall length of vessel. (11) Vessel type: Authorized terms are “air boat”, “auxiliary sail”, “cabin motorboat”, “houseboat”, “inflatable boat”, “open motorboat”, “paddlecraft”, “personal watercraft”, “pontoon boat”, “rowboat”, “sail only”, or “other”. (12) Hull material: Authorized terms are “aluminum”, “fiberglass”, “plastic”, “rubber/vinyl/canvas”, “steel”, “wood”, or “other”. (13) Propulsion type: Authorized terms are “air thrust”, “manual”, “propeller”, “sail”, “water jet”, or “other”. (14) Engine drive type: Authorized terms are “inboard”, “outboard”, “pod drive”, “sterndrive”, or “other”. (15) Fuel: Authorized terms are “electric”, “diesel”, “gas”, or “other”. (b)(1) A certificate of number issued to a manufacturer or dealer for use on a vessel for test or demonstration purposes may omit the information under paragraphs (a)(7) through (a)(15) of this section if the word “manufacturer” or “dealer” is plainly marked on the certificate. (2) A certificate of number issued for a vessel without propulsion machinery may omit paragraphs (a)(14) and (a)(15) of this section if the words “manual vessel” are plainly marked on the certificate. (3) An issuing authority may print on the certificate of number a quotation of State boating regulations or other boating-related information, such as safety reminders, registration, or law enforcement contact information. | |||
| 33:33:2.0.1.8.38.2.228.8 | 33 | Navigation and Navigable Waters | I | S | 174 | PART 174—STATE NUMBERING AND CASUALTY REPORTING SYSTEMS | B | Subpart B—Numbering System Requirements | § 174.21 Temporary certificates. | USCG | [USCG-2003-14963, 77 FR 18702, Mar. 28, 2012] | (a) An issuing authority may issue a temporary certificate of number, valid for no more than 60 days from its date of issuance. (b) Each temporary certificate must contain the following information: (1) Vessel's hull identification number, if any. (2) Make of vessel. (3) Overall length of vessel. (4) Type of propulsion. (5) State in which vessel is principally operated. (6) Name of owner. (7) Address of owner, including ZIP code. (8) Signature of owner. (9) Date of issuance. (10) Notice to the owner that the temporary certificate is valid for the time it specifies, not to exceed 60 days from the date of issuance. (c) For an issuing authority listed in 33 CFR part 173, appendix A on April 27, 2012, the requirements of paragraph (b) of this section apply on January 1, 2017. Between April 27, 2012 and January 1, 2017, the issuing authority may continue to issue temporary certificates containing the contents in effect on April 27, 2012. | |||
| 33:33:2.0.1.8.38.2.228.9 | 33 | Navigation and Navigable Waters | I | S | 174 | PART 174—STATE NUMBERING AND CASUALTY REPORTING SYSTEMS | B | Subpart B—Numbering System Requirements | § 174.23 Form of number. | USCG | (a) Each number must consist of two capital letters denoting the State of the issuing authority, as specified in appendix A of part 173 of this chapter, followed by— (1) Not more than four numerals followed by not more than two capital letters (example: NH 1234 BD); or (2) Not more than three numerals followed by not more than three capital letters (example: WN 567 EFG). (b) A number suffix must not include the letters “I”, “O”, or “Q,” which may be mistaken for numerals. | ||||
| 33:33:2.0.1.8.38.3.228.1 | 33 | Navigation and Navigable Waters | I | S | 174 | PART 174—STATE NUMBERING AND CASUALTY REPORTING SYSTEMS | C | Subpart C—Casualty Reporting System Requirements | § 174.101 Applicability of State casualty reporting system. | USCG | [CGD 72-54R, 37 FR 21402, Oct. 7, 1972, as amended by CGD 76-155, 44 FR 5309, Mar. 25, 1979; CGD 82-015, 54 FR 5610, Feb. 6, 1989] | (a) A State casualty reporting system must require the reporting of vessel casualties and accidents involving vessels to which § 173.51 of this chapter applies. (b) The State casualty reporting system may also require vessel casualty or accident reports for property damage in amounts less than that required under § 173.55 of this chapter. | |||
| 33:33:2.0.1.8.38.3.228.2 | 33 | Navigation and Navigable Waters | I | S | 174 | PART 174—STATE NUMBERING AND CASUALTY REPORTING SYSTEMS | C | Subpart C—Casualty Reporting System Requirements | § 174.103 Administration. | USCG | [CGD 72-54R, 37 FR 21402, Oct. 7, 1972, as amended by CGD 76-155, 44 FR 5309, Mar. 25, 1979] | The State casualty reporting system must be administered by a State agency that— (a) Will provide for the reporting of all casualties and accidents prescribed in § 173.55 of this chapter; (b) Receives reports of vessel casualties or accidents required in § 174.101; (c) Reviews each accident and casualty report to assure the accuracy and completeness of each report; (d) Determines the cause of casualties and accidents reported based on information available and indicates the apparent cause on the casualty report or on an attached page; (e) Notifies the Coast Guard, in writing, when a problem area in boating safety peculiar to the State is determined, together, with corrective measures instituted or recommended; and (f) Reports on vessel numbering and vessel casualties and accidents as required in subpart D of this part. | |||
| 33:33:2.0.1.8.38.3.228.3 | 33 | Navigation and Navigable Waters | I | S | 174 | PART 174—STATE NUMBERING AND CASUALTY REPORTING SYSTEMS | C | Subpart C—Casualty Reporting System Requirements | § 174.105 Owner or operator casualty reporting requirements. | USCG | [CGD 77-117, 44 FR 42195, July 19, 1979] | A State casualty reporting system must contain the following requirements of part 173 applicable to an owner or a person operating a vessel: (a) Section 173.55 Report of casualty or accident. (b) Section 173.57 Casualty or accident report. (c) Section 173.59 Where to report. | |||
| 33:33:2.0.1.8.38.3.228.4 | 33 | Navigation and Navigable Waters | I | S | 174 | PART 174—STATE NUMBERING AND CASUALTY REPORTING SYSTEMS | C | Subpart C—Casualty Reporting System Requirements | § 174.106 State casualty reporting system optional sections. | USCG | [CGD 77-117, 44 FR 42195, July 19, 1979, as amended by USCG-1999-5832, 64 FR 34715, June 29, 1999] | In addition to the requirements in § 174.105, a State casualty reporting system may contain any of the other requirements applicable to a vessel owner or operator prescribed in Part 173. | |||
| 33:33:2.0.1.8.38.3.228.5 | 33 | Navigation and Navigable Waters | I | S | 174 | PART 174—STATE NUMBERING AND CASUALTY REPORTING SYSTEMS | C | Subpart C—Casualty Reporting System Requirements | § 174.107 Contents of casualty or accident report form. | USCG | Each form for reporting a vessel casualty or accident must contain the information required in § 173.57 of this chapter. | ||||
| 33:33:2.0.1.8.38.4.228.1 | 33 | Navigation and Navigable Waters | I | S | 174 | PART 174—STATE NUMBERING AND CASUALTY REPORTING SYSTEMS | D | Subpart D—State Reports | § 174.121 Forwarding of casualty or accident reports. | USCG | [USCG-2003-14963, 77 FR 18702, Mar. 28, 2012, as amended by USCG-2014-0410, 79 FR 38448, July 7, 2014] | Within 30 days of the receipt of a casualty or accident report, the reporting authority receiving the report must forward a paper or electronic copy of that report to the Commandant (CG-BSX-2), Attn: Boating Safety Division, U.S. Coast Guard Stop 7501, 2703 Martin Luther King Jr. Avenue SE., Washington, DC 20593-7501. | |||
| 33:33:2.0.1.8.38.4.228.2 | 33 | Navigation and Navigable Waters | I | S | 174 | PART 174—STATE NUMBERING AND CASUALTY REPORTING SYSTEMS | D | Subpart D—State Reports | § 174.123 Annual report of vessels. | USCG | [USCG-2016-0498, 82 FR 35089, July 28, 2017] | Before March 1 of each year, each State that has an approved numbering system must prepare and submit Coast Guard Form CGHQ-3923 to the Coast Guard. | |||
| 33:33:2.0.1.8.38.4.228.3 | 33 | Navigation and Navigable Waters | I | S | 174 | PART 174—STATE NUMBERING AND CASUALTY REPORTING SYSTEMS | D | Subpart D—State Reports | § 174.125 Coast Guard address. | USCG | [USCG-2003-14963, 77 FR 18703, Mar. 28, 2012, as amended by USCG-2014-0410, 79 FR 38448, July 7, 2014] | The report required by § 174.123 of this subpart must be sent to the Commandant (CG-BSX-2), Attn: Boating Safety Division, U.S. Coast Guard Stop 7501, 2703 Martin Luther King Jr. Avenue SE., Washington, DC 20593-7501. | |||
| 46:46:7.0.1.2.9.1.61.1 | 46 | Shipping | I | S | 174 | PART 174—SPECIAL RULES PERTAINING TO SPECIFIC VESSEL TYPES | A | Subpart A—General | § 174.005 Applicability. | USCG | [CGD 95-012, 60 FR 48052, Sept. 18, 1995; 60 FR 50120, Sept. 28, 1995, as amended by CGD 82-004, CGD 86-074, 60 FR 57671, Nov. 16, 1995; CGD 82-004 and CGD 86-074, 62 FR 49353, Sept. 19, 1997] | Each of the following vessels must comply with the applicable provisions of this part: (a) Deck cargo barge. (b) Mobile offshore drilling unit (MODU) inspected under subchapter IA of this chapter. (c) Tugboat and towboat inspected under subchapter I of this chapter. (d) Self-propelled hopper dredge having an assigned working freeboard. (e) Oceangoing ships of 500 gross tons or over, as calculated by the International Convention on Tonnage Measurement of Ships, 1969, designed primarily for the carriage of dry cargoes, including roll-on/roll-off ships. (f) Offshore supply vessel inspected under subchapter L of this chapter. (g) Liftboat inspected under subchapter L of this chapter. | |||
| 46:46:7.0.1.2.9.1.61.2 | 46 | Shipping | I | S | 174 | PART 174—SPECIAL RULES PERTAINING TO SPECIFIC VESSEL TYPES | A | Subpart A—General | § 174.007 Incorporation by reference. | USCG | [USCG-2007-0030, 75 FR 78086, Dec. 14, 2010, as amended by USCG-2012-0832, 77 FR 59788, Oct. 1, 2012; USCG-2013-0671, 78 FR 60164, Sept. 30, 2013] | (a) Certain material is incorporated by reference into this part with the approval of the Director of the Federal Register under 5 U.S.C. 552(a) and 1 CFR part 51. To enforce any edition other than that specified in this section, the Coast Guard must publish a notice of change in the Federal Register and the material must be available to the public. All approved material is available for inspection at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call 202-741-6030 or go to http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html. It is also available for inspection at Coast Guard Headquarters. Contact Commandant (CG-ENG-2), Attn: Naval Architecture Division, U.S. Coast Guard Stop 7509, 2703 Martin Luther King Jr. Avenue SE., Washington, DC 20593-7509. The material is also from the sources listed in paragraphs (b) and (c) of this section. (b) American Society for Testing and Materials (ASTM) 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959. (1) ASTM F 1196-00, Standard Specification for Sliding Watertight Door Assemblies, 2008, incorporation by reference (IBR) approved for § 174.100. (2) ASTM F 1197-00, Standard Specification for Sliding Watertight Door Control Systems, 2007, IBR approved for § 174.100. (c) International Maritime Organization (IMO), Publications Section, 4 Albert Embankment, London SE1 7SR, United Kingdom, + 44 (0)20 7735 7611, http://www.imo.org/. (1) Resolution MSC.216(82), Adoption of Amendments to the International Convention for the Safety of Life At Sea, 1974, As Amended (IMO Res. MSC.216(82)), Adopted on 8 December 2006, IBR approved for § 174.360. (2) [Reserved] | |||
| 46:46:7.0.1.2.9.10.63.1 | 46 | Shipping | I | S | 174 | PART 174—SPECIAL RULES PERTAINING TO SPECIFIC VESSEL TYPES | J | Subpart J—Special Rules Pertaining to Dry Cargo Ships | § 174.350 Specific applicability. | USCG | This subpart applies to each new ship of 500 gross tons or over, as calculated by the International Convention on Tonnage Measurement of Ships, 1969, designed primarily for the carriage of dry cargoes, including roll-on/roll-off ships and integrated tug and barges (ITBs) when operating as a combined unit. | ||||
| 46:46:7.0.1.2.9.10.63.2 | 46 | Shipping | I | S | 174 | PART 174—SPECIAL RULES PERTAINING TO SPECIFIC VESSEL TYPES | J | Subpart J—Special Rules Pertaining to Dry Cargo Ships | § 174.355 Definitions. | USCG | New ship means a ship: (1) For which the building contract is placed on or after February 1, 1992; or (2) In the absence of a building contract, the keel of which is laid or which is at a similar stage of construction on or after August 1, 1992; or (3) The delivery of which is on or after February 1, 1997; or (4) For which application for reflagging is made on or after February 1, 1997; or (5) Which has undergone a major conversion: (i) For which the contract is placed on or after February 1, 1992; or (ii) In the absence of a contract, the construction work of which is begun on or after August 1, 1992; or (iii) Which is completed on or after February 1, 1997. | ||||
| 46:46:7.0.1.2.9.10.63.3 | 46 | Shipping | I | S | 174 | PART 174—SPECIAL RULES PERTAINING TO SPECIFIC VESSEL TYPES | J | Subpart J—Special Rules Pertaining to Dry Cargo Ships | § 174.360 Calculations. | USCG | [USCG-2007-0030, 75 FR 78086, Dec. 14, 2010] | Each ship to which this subpart applies must comply with the minimum standard of subdivision and damage stability applicable to that ship under IMO Res. MSC.216(82), (incorporated by reference, see § 174.007). Compliance with the applicable requirements must be demonstrated by calculations and reflected in information on loading restrictions, such as a maximum height of the center of gravity (KG) or minimum metacentric height (GM) curve, that is part of the stability information required by § 170.110 of this chapter. | |||
| 46:46:7.0.1.2.9.2.61.1 | 46 | Shipping | I | S | 174 | PART 174—SPECIAL RULES PERTAINING TO SPECIFIC VESSEL TYPES | B | Subpart B—Special Rules Pertaining to Deck Cargo Barges | § 174.010 Specific applicability. | USCG | Each barge that carries cargo above the weather deck must comply with this subpart. | ||||
| 46:46:7.0.1.2.9.2.61.2 | 46 | Shipping | I | S | 174 | PART 174—SPECIAL RULES PERTAINING TO SPECIFIC VESSEL TYPES | B | Subpart B—Special Rules Pertaining to Deck Cargo Barges | § 174.015 Intact stability. | USCG | (a) Except as provided in § 174.020, in each condition of loading and operation, each barge must be shown by design calculations to have an area under the righting arm curve up to the angle of maximum righting arm, the downflooding angle, or 40 degrees, whichever angle is smallest, equal to or greater than— (1) 15 foot-degrees (4.57 meter-degrees) for ocean and Great Lakes winter service; and (2) 10 foot-degrees (3.05 meter-degrees) for lakes, bays, sounds, and Great Lakes summer service. (b) For the purpose of this section, downflooding angle means the static angle from the intersection of the vessel's centerline and waterline in calm water to the first opening that does not close watertight automatically. | ||||
| 46:46:7.0.1.2.9.2.61.3 | 46 | Shipping | I | S | 174 | PART 174—SPECIAL RULES PERTAINING TO SPECIFIC VESSEL TYPES | B | Subpart B—Special Rules Pertaining to Deck Cargo Barges | § 174.020 Alternate intact stability criterion. | USCG | A barge need not comply with § 174.015 and subparts C and E of part 170 of this chapter if it has the following characteristics: (a) The weather deck is watertight. (b) The barge's hull proportions fall within any one of the ratios in categories (A) through (D) in Table 174.020. (c) The maximum cargo height is 30 feet (9.25 meters) or a value equal to the depth of the barge amidships, whichever is less. Table 174.020 | ||||
| 46:46:7.0.1.2.9.3.61.1 | 46 | Shipping | I | S | 174 | PART 174—SPECIAL RULES PERTAINING TO SPECIFIC VESSEL TYPES | C | Subpart C—Special Rules Pertaining to Mobile Offshore Drilling Units | § 174.030 Specific applicability. | USCG | Each mobile offshore drilling unit (MODU) inspected under Subchapter IA of this chapter must comply with this subpart. | ||||
| 46:46:7.0.1.2.9.3.61.10 | 46 | Shipping | I | S | 174 | PART 174—SPECIAL RULES PERTAINING TO SPECIFIC VESSEL TYPES | C | Subpart C—Special Rules Pertaining to Mobile Offshore Drilling Units | § 174.080 Flooding on self-elevating and surface type units. | USCG | (a) On a surface type unit or self-elevating unit, all compartments within 5 feet (1.5 meters) of the hull of the unit between two adjacent main watertight bulkheads, the bottom shell, and the uppermost continuous deck or first superstructure deck where superstructures are fitted must be assumed to be subject to simultaneous flooding. (b) On the mat of a self-elevating unit, all compartments of the mat must be assumed to be subject to individual flooding. | ||||
| 46:46:7.0.1.2.9.3.61.11 | 46 | Shipping | I | S | 174 | PART 174—SPECIAL RULES PERTAINING TO SPECIFIC VESSEL TYPES | C | Subpart C—Special Rules Pertaining to Mobile Offshore Drilling Units | § 174.085 Flooding on column stabilized units. | USCG | (a) Watertight compartments that are outboard of, or traversed by, a plane which connects the vertical centerlines of the columns on the periphery of the unit, and within 5 feet (1.5 meters) of an outer surface of a column or footing on the periphery of the unit, must be assumed to be subject to flooding as follows: (1) When a column is subdivided into watertight compartments by horizontal watertight flats, all compartments in the column within 5 feet (1.5 meters) of the unit's waterline before damage causing flooding must be assumed to be subject to simultaneous flooding. (2) When a column is subdivided into watertight compartments by vertical watertight bulkheads, each two adjacent compartments must be assumed subject to simultaneous flooding if the distance between the vertical watertight bulkheads, measured at the column periphery, is equal to or less than one-eighth of the column perimeter at the draft under consideration. (3) When a column is subdivided into watertight compartments by horizontal watertight flats and vertical watertight bulkheads, those compartments that are within the bounds described in paragraph (a)(2) of this section and within 5 feet (1.5 meters) of the unit's waterline before damage causing flooding must be assumed to be subject to simultaneous flooding. (b) Each compartment in a footing must be assumed to be subject to individual flooding when any part of the compartment is within 5 feet (1.5 meters) of the unit's waterline before damage causing flooding. | ||||
| 46:46:7.0.1.2.9.3.61.12 | 46 | Shipping | I | S | 174 | PART 174—SPECIAL RULES PERTAINING TO SPECIFIC VESSEL TYPES | C | Subpart C—Special Rules Pertaining to Mobile Offshore Drilling Units | § 174.090 Permeability of spaces. | USCG | When doing the calculations required in § 174.065— (a) The permeability of a floodable space, other than a machinery space, must be as listed in Table 174.090; and (b) Calculations in which a machinery space is treated as a floodable space must be based on an assumed machinery space permeability of 85%, unless the use of an assumed permeability of less than 85% is justified in detail. Table 174.090—Permeability 1 Whichever results in the more disabling condition. 2 If tanks are partially filled, the permeability must be determined from the actual density and amount of liquid carried. | ||||
| 46:46:7.0.1.2.9.3.61.13 | 46 | Shipping | I | S | 174 | PART 174—SPECIAL RULES PERTAINING TO SPECIFIC VESSEL TYPES | C | Subpart C—Special Rules Pertaining to Mobile Offshore Drilling Units | § 174.100 Appliances for watertight and weathertight integrity. | USCG | [CGD 79-023, 48 FR 51048, Nov. 4, 1983, as amended by CGD 88-032, 56 FR 35828, July 29, 1991; USCG-2000-7790, 65 FR 58464, Sept. 29, 2000] | (a) Appliances to insure watertight integrity include watertight doors, hatches, scuttles, bolted manhole covers, or other watertight closures for openings in watertight decks and bulkheads. (b) Appliances to insure weathertight integrity include weathertight doors and hatches, closures for air pipes, ventilators, ventilation intakes and outlets, and closures for other openings in deckhouses and superstructures. (c) Each internal opening equipped with appliances to insure watertight integrity that is used intermittently during operation of the unit while afloat must meet the following: (1) Each door, hatch, and scuttle must— (i) Be remotely controlled from a normally manned control station, and be operable locally from both sides of the bulkhead; or (ii) If there is no means of remote control there must be an alarm system that signals whether the appliance is open or closed both locally at each appliance and in a normally manned control station. (2) Each closing appliance must remain watertight under the design water pressure of the watertight boundary of which it is a part. (d) Each external opening fitted with an appliance to insure weathertight integrity must be located so that it would not be submerged below the final equilibrium waterline if the unit is subjected simultaneously to— (1) Damage causing flooding described in §§ 174.075 through 174.085; and (2) A wind heeling moment calculated in accordance with § 174.055 using a wind velocity of 50 knots (25.8 meters per second). (e) If a unit is equipped with sliding watertight doors, each sliding watertight door must— (1) Be designed, constructed, tested, and marked in accordance with ASTM F 1196 (incorporated by reference, see § 174.007); (2) Have controls in accordance with ASTM F 1197 (incorporated by reference, see § 174.007), except that a remote manual means of closure, as specified in paragraphs 7.1 and 7.5.1, and a remote mechanical indicator, as specified in paragraph 7.5.2, will not be required; and (3) If installed in a subdivision bul… | |||
| 46:46:7.0.1.2.9.3.61.2 | 46 | Shipping | I | S | 174 | PART 174—SPECIAL RULES PERTAINING TO SPECIFIC VESSEL TYPES | C | Subpart C—Special Rules Pertaining to Mobile Offshore Drilling Units | § 174.035 Definitions. | USCG | (a) For the purpose of this subpart the following terms have the same definitions as given in subchapter IA of this chapter: (1) Column stabilized unit. (2) Mobile offshore drilling unit. (3) Self-elevating unit. (4) Surface type unit. (b) For the purpose of this subpart— (1) Downflooding means the entry of seawater through any opening that cannot be rapidly closed watertight, into the hull, superstructure, or columns of an undamaged unit due to heel, trim, or submergence of the unit. (2) Downflooding angle means the static angle from the intersection of the unit's centerline and waterline in calm water to the first opening through which downflooding can occur when subjected to a wind heeling moment (Hm) calculated in accordance with § 174.055. (3) Normal operating condition means a condition of a unit when loaded or arranged for drilling, field transit, or ocean transit. (4) Severe storm condition means a condition of a unit when loaded or arranged to withstand the passage of a severe storm. | ||||
| 46:46:7.0.1.2.9.3.61.3 | 46 | Shipping | I | S | 174 | PART 174—SPECIAL RULES PERTAINING TO SPECIFIC VESSEL TYPES | C | Subpart C—Special Rules Pertaining to Mobile Offshore Drilling Units | § 174.040 Stability requirements: general. | USCG | Each unit must be designed to have at least 2 inches (50mm) of positive metacentric height in the upright equilibrium position for the full range of drafts, whether at the operating draft for navigation, towing, or drilling afloat, or at a temporary draft when changing drafts. | ||||
| 46:46:7.0.1.2.9.3.61.4 | 46 | Shipping | I | S | 174 | PART 174—SPECIAL RULES PERTAINING TO SPECIFIC VESSEL TYPES | C | Subpart C—Special Rules Pertaining to Mobile Offshore Drilling Units | § 174.045 Intact stability requirements. | USCG | [CGD 79-023, 48 FR 51048, Nov. 4, 1983, as amended by CGD 83-071, 52 FR 6979, Mar. 6, 1987] | (a) Each unit must be designed so that the wind heeling moments (Hm) and righting moments calculated for each of its normal operating conditions and severe storm conditions, when plotted on GRAPH 174.045, define areas that satisfy the equation: Area(A)≥(K) × (Area (B)) where— (1) K = 1.4 except that if the unit is a column stabilized unit K = 1.3; (2) Area (A) is the area on GRAPH 174.045 under the righting moment curve between 0 and the second intercept angle or the angle of heel at which downflooding would occur, whichever angle is less; and (3) Area (B) is the area on GRAPH 174.045 under the wind heeling moment curve between 0 and the second intercept angle or the angle of heel at which downflooding of the unit would occur whichever angle is less. where— (1) K = 1.4 except that if the unit is a column stabilized unit K = 1.3; (2) Area (A) is the area on GRAPH 174.045 under the righting moment curve between 0 and the second intercept angle or the angle of heel at which downflooding would occur, whichever angle is less; and (3) Area (B) is the area on GRAPH 174.045 under the wind heeling moment curve between 0 and the second intercept angle or the angle of heel at which downflooding of the unit would occur whichever angle is less. (b) Each righting moment on graph § 174.045 must be positive for all angles greater than 0 and less than the second intercept angle. (c) For the purposes of this section, openings fitted with the weathertight closing appliances specified in § 174.100(b) are not considered as openings through which downflooding could occur if they can be rapidly closed and would not be submerged below the units' waterline prior to the first intercept angle, except that ventilation intakes and outlets for machinery spaces, crew spaces, and other spaces where ventilation is normally required are considered as openings through which downflooding could occur regardless of location. (d) Each unit must be designed so that it can be changed from each of its normal operating conditions to a se… | |||
| 46:46:7.0.1.2.9.3.61.5 | 46 | Shipping | I | S | 174 | PART 174—SPECIAL RULES PERTAINING TO SPECIFIC VESSEL TYPES | C | Subpart C—Special Rules Pertaining to Mobile Offshore Drilling Units | § 174.050 Stability on bottom. | USCG | Each bottom bearing unit must be designed so that, while supported on the sea bottom with footings or a mat, it continually exerts a downward force on each footing or the mat when subjected to the forces of wave and current and to wind blowing at the velocities described in § 174.055(b)(3). | ||||
| 46:46:7.0.1.2.9.3.61.6 | 46 | Shipping | I | S | 174 | PART 174—SPECIAL RULES PERTAINING TO SPECIFIC VESSEL TYPES | C | Subpart C—Special Rules Pertaining to Mobile Offshore Drilling Units | § 174.055 Calculation of wind heeling moment (Hm). | USCG | [CGD 79-023, 48 FR 51048, Nov. 4, 1983, as amended by USCG-2014-0688, 79 FR 58287, Sept. 29, 2014] | (a) The wind heeling moment (Hm) of a unit in a given normal operating condition or severe storm condition is the sum of the individual wind heeling moments (H) calculated for each of the exposed surfaces on the unit; i.e. , Hm=Σ H. (b) Each wind heeling moment (H) must be calculated using the equation: H = k(v) 2 (Ch)(Cs)(A)(h) where— (1) H = wind heeling moment for an exposed surface on the unit in foot-pounds (kilogram-meters); (2) k = 0.00338 lb./(ft. 2 -knots 2 ) (0.0623 (kg-sec 2 )/m 4 ); (3) v = wind velocity of— (i) 70 knots (36 meters per second) for normal operating conditions. (ii) 100 knots (51.5 meters per second) for severe storm conditions. (iii) 50 knots (25.8 meters per second) for damage conditions. (4) A = projected area in square feet (square meters) of an exposed surface on the unit; (5) Ch = height coefficient for “A” from Table 174.055(a); (6) Cs = shape coefficient for “A” from Table 174.055(b); and (7) h = the vertical distance in feet (meters) from the center of lateral resistance of the underwater hull to the center of wind pressure on “A”. where— (1) H = wind heeling moment for an exposed surface on the unit in foot-pounds (kilogram-meters); (2) k = 0.00338 lb./(ft. 2 -knots 2 ) (0.0623 (kg-sec 2 )/m 4 ); (3) v = wind velocity of— (i) 70 knots (36 meters per second) for normal operating conditions. (ii) 100 knots (51.5 meters per second) for severe storm conditions. (iii) 50 knots (25.8 meters per second) for damage conditions. (4) A = projected area in square feet (square meters) of an exposed surface on the unit; (5) Ch = height coefficient for “A” from Table 174.055(a); (6) Cs = shape coefficient for “A” from Table 174.055(b); and (7) h = the vertical distance in feet (meters) from the center of lateral resistance of the underwater hull to the center of wind pressure on “A”. (c) When calculating “A” in the equation described in paragraph (b) of this section— (1) The projected area of each column or leg; if the unit has columns… | |||
| 46:46:7.0.1.2.9.3.61.7 | 46 | Shipping | I | S | 174 | PART 174—SPECIAL RULES PERTAINING TO SPECIFIC VESSEL TYPES | C | Subpart C—Special Rules Pertaining to Mobile Offshore Drilling Units | § 174.065 Damage stability requirements. | USCG | (a) Each unit must be designed so that, while in each of its normal operating conditions and severe storm conditions, its final equilibrium waterline would remain below the lowest edge of any opening through which additional flooding could occur if the unit were subjected simultaneously to— (1) Damage causing flooding described in §§ 174.075 through 174.085; and (2) A wind heeling moment calculated in accordance with § 174.055(b) using a wind velocity of 50 knots (25.8 meters per second). (b) Each unit must have a means to close off each pipe, ventilation system, and trunk in each compartment described in § 174.080 or § 174.085 if any portion of the pipe, ventilation system, or trunk is within 5 feet (1.5 meters) of the hull. | ||||
| 46:46:7.0.1.2.9.3.61.8 | 46 | Shipping | I | S | 174 | PART 174—SPECIAL RULES PERTAINING TO SPECIFIC VESSEL TYPES | C | Subpart C—Special Rules Pertaining to Mobile Offshore Drilling Units | § 174.070 General damage stability assumptions. | USCG | For the purpose of determining compliance with § 174.065, the assumptions are made that during flooding and the resulting change in the unit's waterline— (a) The unit is not anchored or moored; and (b) No compartment on the unit is ballasted or pumped out to compensate for the flooding described in §§ 174.075 through 174.085. | ||||
| 46:46:7.0.1.2.9.3.61.9 | 46 | Shipping | I | S | 174 | PART 174—SPECIAL RULES PERTAINING TO SPECIFIC VESSEL TYPES | C | Subpart C—Special Rules Pertaining to Mobile Offshore Drilling Units | § 174.075 Compartments assumed flooded: general. | USCG | The individual flooding of each of the compartments described in §§ 174.080 and 174.085 must be assumed for the purpose of determining compliance with § 174.065 (a). Simultaneous flooding of more than one compartment must be assumed only when indicated in §§ 174.080 and 174.085. | ||||
| 46:46:7.0.1.2.9.5.61.1 | 46 | Shipping | I | S | 174 | PART 174—SPECIAL RULES PERTAINING TO SPECIFIC VESSEL TYPES | E | Subpart E—Special Rules Pertaining to Tugboats and Towboats | § 174.140 Specific applicability. | USCG | Each tugboat and towboat inspected under subchapter I of this chapter must comply with this subpart. | ||||
| 46:46:7.0.1.2.9.5.61.2 | 46 | Shipping | I | S | 174 | PART 174—SPECIAL RULES PERTAINING TO SPECIFIC VESSEL TYPES | E | Subpart E—Special Rules Pertaining to Tugboats and Towboats | § 174.145 Intact stability requirements. | USCG | (a) In each condition of loading and operation, each vessel must be shown by design calculations to meet the requirements of paragraphs (b) through (e) of this section. (b) The area under each righting arm curve must be at least 16.9 foot-degrees (5.15 meter-degrees) up to the smallest of the following angles: (1) The angle of maximum righting arm. (2) The downflooding angle. (3) 40 degrees. (c) The area under each righting arm curve must be at least 5.6 foot-degrees (1.72 meter-degrees) between the angles of 30 degrees and 40 degrees, or between 30 degrees and the downflooding angle if this angle is less than 40 degrees. (d) The maximum righting arm shall occur at a heel of at least 25 degrees. (e) The righting arm curve must be positive to at least 60 degrees. (f) For the purpose of this section, at each angle of heel, a vessel's righting arm may be calculated considering either— (1) The vessel is permitted to trim free until the trimming moment is zero; or (2) The vessel does not trim as it heels. | ||||
| 46:46:7.0.1.2.9.7.61.1 | 46 | Shipping | I | S | 174 | PART 174—SPECIAL RULES PERTAINING TO SPECIFIC VESSEL TYPES | G | Subpart G—Special Rules Pertaining to Offshore Supply Vessels | § 174.180 Applicability. | USCG | [USCG-2012-0208, 79 FR 48939, Aug. 18, 2014] | This subpart applies to OSVs except liftboats inspected under subchapter L of this chapter and OSVs of at least 6,000 GT ITC (500 GRT if GT ITC is not assigned) as defined in § 125.160 of this chapter. | |||
| 46:46:7.0.1.2.9.7.61.10 | 46 | Shipping | I | S | 174 | PART 174—SPECIAL RULES PERTAINING TO SPECIFIC VESSEL TYPES | G | Subpart G—Special Rules Pertaining to Offshore Supply Vessels | § 174.220 Hatches and coamings. | USCG | (a) Each hatch exposed to the weather must be watertight, except that the following hatches may be only weathertight: (1) Each hatch on a watertight trunk that extends at least 430 millimeters (17 inches) above the weather deck. (2) Each hatch in a cabin top. (b) Each hatch cover must— (1) Have securing-devices; and (2) Be attached to the hatch frame or coaming by hinges, captive chains, or other devices to prevent its loss. (c) Each hatch that provides access to quarters or to accommodation spaces for crew members or offshore workers must be capable of being opened and closed from either side. (d) Except as provided by paragraph (e) of this section, a weathertight door with a permanent watertight coaming at least 380 millimeters (15 inches) high must be installed for each opening in a deckhouse or companionway that— (1) Gives access into the hull; and (2) Is in an exposed place. (e) If an opening in a deckhouse or companionway has a Class-1 watertight door installed, the height of the watertight coaming need only accommodate the door. | ||||
| 46:46:7.0.1.2.9.7.61.11 | 46 | Shipping | I | S | 174 | PART 174—SPECIAL RULES PERTAINING TO SPECIFIC VESSEL TYPES | G | Subpart G—Special Rules Pertaining to Offshore Supply Vessels | § 174.225 Hull penetrations and shell connections. | USCG | Each overboard discharge and shell connection except an engine exhaust must comply with §§ 56.50-95 and 128.230 of this chapter. | ||||
| 46:46:7.0.1.2.9.7.61.2 | 46 | Shipping | I | S | 174 | PART 174—SPECIAL RULES PERTAINING TO SPECIFIC VESSEL TYPES | G | Subpart G—Special Rules Pertaining to Offshore Supply Vessels | § 174.185 Intact stability. | USCG | (a) Each OSV must be shown by design calculations to meet, under each condition of loading and operation, the minimal requirements for metacentric height (GM) in § 170.170 of this chapter, and in either § 170.173 of this chapter or paragraphs (b) through (e) of this section. (b) The area under each righting arm curve must be at least 0.08 meter-radians (15 foot-degrees) up to the smallest of the following angles: (1) The angle of maximum righting arm; (2) The downflooding angle; or (3) 40 degrees. (c) The downflooding angle must not be less than 20 degrees. (d) The righting arm curve must be positive to at least 40 degrees. (e) The freeboard at the stern must be equal to the freeboard calculated to comply with subchapter E of this chapter or to the value taken from Table 174.185, whichever is less. (f) For paragraphs (b) and (d) of this section, at each angle of heel an OSV's righting arm may be calculated considering either— (1) The vessel is permitted to trim free until the trimming moment is zero; or (2) The vessel does not trim as it heels. (g) For the purpose of paragraphs (b) and (d) of this section, the method of calculating righting arms chosen must be the same for all calculations. Table 174.185—Minimal Freeboard at the Stern | ||||
| 46:46:7.0.1.2.9.7.61.3 | 46 | Shipping | I | S | 174 | PART 174—SPECIAL RULES PERTAINING TO SPECIFIC VESSEL TYPES | G | Subpart G—Special Rules Pertaining to Offshore Supply Vessels | § 174.190 Collision bulkhead. | USCG | (a) Each OSV must have a collision bulkhead in compliance with §§ 171.085(c)(1), (d), (e)(2), and (f) of this chapter. (b) Penetration of the collision bulkhead by piping must be minimal, and, where fitted, piping must meet the requirements of §§ 56.50-1(b)(1) and (c) and 128.230 of this chapter. | ||||
| 46:46:7.0.1.2.9.7.61.4 | 46 | Shipping | I | S | 174 | PART 174—SPECIAL RULES PERTAINING TO SPECIFIC VESSEL TYPES | G | Subpart G—Special Rules Pertaining to Offshore Supply Vessels | § 174.195 Bulkheads in machinery spaces. | USCG | (a) The bulkhead in each machinery space of each OSV must be watertight to the bulkhead deck. (b) Each penetration of, and each opening in, a bulkhead in a machinery space must— (1) Be kept as high and as far inboard as practicable; and (2) Except as provided by § 174.210 of this subpart and by paragraph (c) of this section, have means to make it watertight. (c) No penetration of a bulkhead in a machinery space by a ventilation duct need have means to make the bulkhead watertight if— (1) Every part of the duct is at least 760 millimeter (30 inches) from the side of the OSV; and (2) The duct is continuously watertight from the penetration to the main deck. (d) Each penetration of a bulkhead in a machinery space by piping must meet the design requirements for material and pressure in subchapter F of this chapter. | ||||
| 46:46:7.0.1.2.9.7.61.5 | 46 | Shipping | I | S | 174 | PART 174—SPECIAL RULES PERTAINING TO SPECIFIC VESSEL TYPES | G | Subpart G—Special Rules Pertaining to Offshore Supply Vessels | § 174.200 Damaged stability in machinery spaces for all OSVs. | USCG | Each OSV must be shown by design calculations to comply, under each afloat condition of loading and operation, with § 174.207 of this subpart in case of damage between any two watertight bulkheads in each machinery space. | ||||
| 46:46:7.0.1.2.9.7.61.6 | 46 | Shipping | I | S | 174 | PART 174—SPECIAL RULES PERTAINING TO SPECIFIC VESSEL TYPES | G | Subpart G—Special Rules Pertaining to Offshore Supply Vessels | § 174.205 Additional damaged stability for OSVs carrying more than 16 offshore workers. | USCG | (a) Calculations. Each OSV carrying more than 16 offshore workers must be shown by design calculations to comply, under each afloat condition of loading and operation, with § 174.207 of this subpart in case of the damage specified by paragraph (b) of this section. (b) Character of damage. For paragraph (a) of this section, design calculations must show that the OSV can survive damage at any place other than either the collision bulkhead or a transverse watertight bulkhead unless— (1) The transverse watertight bulkhead is closer than the longitudinal extent of damage, specified by Table 174.207(a), to the adjacent transverse watertight bulkhead; or (2) The transverse watertight bulkhead has a step or a recess, which must be assumed damaged, if it is both more than 3 meters (10 feet) in length and located within the transverse extent of damage specified by Table 174.207(a) of this section. | ||||
| 46:46:7.0.1.2.9.7.61.7 | 46 | Shipping | I | S | 174 | PART 174—SPECIAL RULES PERTAINING TO SPECIFIC VESSEL TYPES | G | Subpart G—Special Rules Pertaining to Offshore Supply Vessels | § 174.207 Damaged stability criteria. | USCG | (a) Extent of damage. Damage must consist of penetrations having the dimensions specified by table 174.207(a) of this section, except that, if the most disabling penetrations are smaller than the penetrations specified by the table, damage must consist of the smaller penetrations. (b) Permeability of spaces. The permeability of a floodable space must be as specified by Table 174.207(b) of this section. (c) Survival conditions. An OSV is presumed to survive assumed damage if it meets the following conditions in the final stage of flooding: (1) Final waterline. The final waterline, in the final stage of sinkage, heel, and trim, must be below the lower edge of an opening through which progressive flooding may take place, such as an air pipe, a tonnage opening, an opening closed by a weathertight door or hatch-cover, or a tank vent fitted with a ball check-valve. This opening does not include an opening closed by a— (i) Watertight manhole-cover; (ii) Flush scuttle; (iii) Small hatch-cover for a watertight cargo-tank that maintains the high integrity of the deck; (iv) Watertight door in compliance with § 174.210 of this subpart; or (v) Side scuttle of the non-opening type. (2) Angle of heel. The angle of heel must not exceed 15 degrees. (3) Range of stability. Through an angle of 20 degrees beyond its position of equilibrium after flooding, an OSV must meet the following conditions: (i) The righting arm curve must be positive. (ii) The righting arm must be at least 100 millimeters (4 inches). (iii) Each submerged opening must be weathertight. (A tank vent fitted with a ball check-valve is weathertight.) (4) Progressive flooding. Piping, ducts, or tunnels within the assumed extent of damage must be either— (i) Equipped with arrangements, such as stop check-valves, to prevent progressive flooding of the spaces with which they connect; or (ii) Assumed in the calculations required by paragraph (a) of this section to permit progressive flooding of the spaces with which they connect. (d) Buoy… | ||||
| 46:46:7.0.1.2.9.7.61.8 | 46 | Shipping | I | S | 174 | PART 174—SPECIAL RULES PERTAINING TO SPECIFIC VESSEL TYPES | G | Subpart G—Special Rules Pertaining to Offshore Supply Vessels | § 174.210 Watertight doors in watertight bulkheads. | USCG | (a) This section applies to each vessel with watertight doors in bulkheads made watertight in compliance with this chapter. (b) Except as provided by paragraph (c) of this section, each watertight door must comply with subpart H of part 170 of this chapter. (c) A Class-1 door may be installed at any place if— (1) The door has a quick-acting closing-device operative from both sides of the door; (2) The door is designed to withstand a head of water equivalent to the depth from the sill of the door to the bulkhead deck or 3 meters (10 feet), whichever is greater; and (3) The vessel's pilothouse contains a visual indicator showing whether the door is open or closed. (d) Each watertight door must be marked in compliance with § 131.893 of this chapter. (e) If a Class-1 door is installed, the vessel's stability letter will require the master to ensure that the door is always closed except when being used for access. | ||||
| 46:46:7.0.1.2.9.7.61.9 | 46 | Shipping | I | S | 174 | PART 174—SPECIAL RULES PERTAINING TO SPECIFIC VESSEL TYPES | G | Subpart G—Special Rules Pertaining to Offshore Supply Vessels | § 174.215 Drainage of weather deck. | USCG | The weather deck must have open rails to allow rapid clearing of water, or must have freeing ports in compliance with § 42.15-70 of this chapter. | ||||
| 46:46:7.0.1.2.9.8.61.1 | 46 | Shipping | I | S | 174 | PART 174—SPECIAL RULES PERTAINING TO SPECIFIC VESSEL TYPES | H | Subpart H—Special Rules Pertaining to Liftboats | § 174.240 Applicability. | USCG | Each liftboat inspected under subchapter L of this chapter must comply with this subpart. | ||||
| 46:46:7.0.1.2.9.8.61.2 | 46 | Shipping | I | S | 174 | PART 174—SPECIAL RULES PERTAINING TO SPECIFIC VESSEL TYPES | H | Subpart H—Special Rules Pertaining to Liftboats | § 174.245 General. | USCG | Each liftboat must comply with §§ 174.210 through 174.225. | ||||
| 46:46:7.0.1.2.9.8.61.3 | 46 | Shipping | I | S | 174 | PART 174—SPECIAL RULES PERTAINING TO SPECIFIC VESSEL TYPES | H | Subpart H—Special Rules Pertaining to Liftboats | § 174.250 Unrestricted service. | USCG | Each liftboat not limited to restricted service must comply with subpart C of this part in each condition of loading and operation. | ||||
| 46:46:7.0.1.2.9.8.61.4 | 46 | Shipping | I | S | 174 | PART 174—SPECIAL RULES PERTAINING TO SPECIFIC VESSEL TYPES | H | Subpart H—Special Rules Pertaining to Liftboats | § 174.255 Restricted service. | USCG | This section applies to each liftboat unable to comply with § 174.250 and limited to restricted service as defined by § 125.160 of this chapter. (a) Intact stability. (1) Each liftboat must be shown by design calculations to meet, under each condition of loading and operation afloat, the following requirements: (i) Those imposed by § 174.045, given a “K” value of at least 1.4. (ii) A range of positive stability of at least 10 degrees extending from the angle of the first intercept of the curves of righting moment and wind heeling moment, either to the angle of the second intercept of those curves or to the angle of heel at which downflooding would occur, whichever angle is less. (iii) A residual righting energy of at least 0.003 meter radians (5 foot-degrees) between the angle of the first intercept of the curves of righting moment and wind heeling moment, either to the angle of the second intercept of those curves or to the angle of heel at which downflooding would occur, whichever angle is less. (2) For this section, each wind heeling moment must be calculated as prescribed by § 174.055 of this part using winds of 60 knots for normal conditions of operation afloat and of 70 knots for severe-storm conditions of operation afloat. (3) For paragraph (a)(1) of this section, the initial metacentric height must be at least 300 millimeters (1 foot) for each leg position encountered while afloat including the full range of leg positions encountered while jacking. (b) Damaged stability. (1) Each liftboat must be designed so that, while it is in each of its normal operating conditions, its final equilibrium waterline will remain below the lowest edge of any opening through which additional flooding can occur if the liftboat is subjected simultaneously to— (i) Damage causing flooding described by paragraph (b)(4) of this section; and (ii) A wind heeling moment calculated in compliance with § 174.055(b) using a wind speed of 50 knots. (2) Each liftboat must have a means of closing off each pipe, ventilation sy… | ||||
| 46:46:7.0.1.2.9.8.61.5 | 46 | Shipping | I | S | 174 | PART 174—SPECIAL RULES PERTAINING TO SPECIFIC VESSEL TYPES | H | Subpart H—Special Rules Pertaining to Liftboats | § 174.260 Freeboard. | USCG | (a) Each liftboat not required to obtain and maintain a loadline in compliance with subchapter E of this chapter must place markings on each side of the vessel amidships. These markings must each consist of a horizontal line 460 millimeters (18 inches) in length and 25 millimeters (1 inch) in height. The upper edges of the markings must be at a distance equal to the authorized freeboard measured vertically below the intersection of the continuation outwards of the upper surface of the weather deck and the outer surface of the shell. This distance must be at least 610 millimeters (24 inches). (b) The markings required by paragraph (a) of this section may not be submerged in any condition of loading or operation. | ||||
| 46:46:7.0.1.2.9.9.61.1 | 46 | Shipping | I | S | 174 | PART 174—SPECIAL RULES PERTAINING TO SPECIFIC VESSEL TYPES | I | Subpart I—Hopper Dredges With Working Freeboard Assignments | § 174.300 Specific applicability. | USCG | This subpart applies to each self-propelled hopper dredge for which a working freeboard assignment is being sought under part 44, subpart C, of this chapter. | ||||
| 46:46:7.0.1.2.9.9.61.2 | 46 | Shipping | I | S | 174 | PART 174—SPECIAL RULES PERTAINING TO SPECIFIC VESSEL TYPES | I | Subpart I—Hopper Dredges With Working Freeboard Assignments | § 174.305 Definitions. | USCG | Hopper dredge has the same meaning as contained in § 44.310 of this chapter. Length has the same meaning as contained in § 42.13-15(a) of this chapter. Working freeboard has the same meaning as contained in § 44.310 of this chapter. | ||||
| 46:46:7.0.1.2.9.9.61.3 | 46 | Shipping | I | S | 174 | PART 174—SPECIAL RULES PERTAINING TO SPECIFIC VESSEL TYPES | I | Subpart I—Hopper Dredges With Working Freeboard Assignments | § 174.310 General. | USCG | (a) Each hopper dredge under this subpart must be shown by design calculations based on the assumptions under paragraphs (b), (c), (d), and (e) of this section, that it meets— (1) The requirements in §§ 170.170, 170.173, and 170.300 of this chapter in each condition of loading and operation; and (2) The survival conditions of § 174.320 in each condition of loading and operation assuming the character and extent of damage specified in § 174.315. (b) The calculations required by paragraph (a) of this section must assume: (1) The hoppers are full of seawater; (2) The permeability of flooded spaces is as provided by Table 174.310; (3) The equalization provisions of § 174.325; and (4) The jettisoning provisions of § 174.330. (c) The calculations required by this section must take into account a sufficient number of loading conditions to identify the condition in which the vessel is least stable, including, but not limited to, the most severe loading condition, and the: (1) Specific gravity of the dredge spoil, from 1.02 up to and including the maximum required by paragraph (e)(1) of this section; and (2) Draft, up to and including the draft corresponding to the working freeboard for the full range of trim. (d) The calculations required by this section for a dredge with open hoppers may include spillage of spoil from the hopper resulting from changing the angle of heel and trim. (e) The following assumptions must be made when doing the calculations required by this section: (1) Dredged spoil in the hopper is a homogeneous liquid with a maximum specific gravity for the areas of operation. (2) When calculating the vessel's righting arm, it is assumed at each angle of heel that the vessel trims free and the trimming moment is zero. Table 174.310—Permeability of Floodable Spaces | ||||
| 46:46:7.0.1.2.9.9.61.4 | 46 | Shipping | I | S | 174 | PART 174—SPECIAL RULES PERTAINING TO SPECIFIC VESSEL TYPES | I | Subpart I—Hopper Dredges With Working Freeboard Assignments | § 174.315 Extent and character of damage. | USCG | (a) The calculations required by § 174.310 must show that the dredge can survive damage at any location along the length of the vessel including at a transverse bulkhead in accordance with paragraph (b) of this section. (b) The calculations required by paragraph (a) of this section must assume the most disabling side penetration with the damage collision penetration provided by Table 174.315, except that if the most disabling damage collision penetrations would be less than those provided by Table 174.315, the smaller damage collision penetration must be assumed. Table 174.315—Extent of Damage Collision Penetration 1 Damage applied inboard from the vessel's side at a right angle to the centerline at the draft corresponding to the working freeboard assigned under subchapter E of this chapter. | ||||
| 46:46:7.0.1.2.9.9.61.5 | 46 | Shipping | I | S | 174 | PART 174—SPECIAL RULES PERTAINING TO SPECIFIC VESSEL TYPES | I | Subpart I—Hopper Dredges With Working Freeboard Assignments | § 174.320 Damage survival. | USCG | A hopper dredge survives assumed damage if it meets the following conditions: (a) The maximum angle of heel in each stage of flooding must not exceed 30 degrees or the angle of downflooding whichever is less. (b) The final waterline, taking into account sinkage, heel, and trim, must be below the lowest edge of each opening through which progressive flooding may take place. (c) The righting arm curve calculated after damage must: (1) Have a minimum positive range of 20 degrees beyond the angle of equilibrium; and (2) Reach a height of at least 4 inches (l00mm) within the 20 degree positive range. (d) Each opening within, or partially within, the 20 degree range beyond the angle of equilibrium must be weathertight. (e) After flooding or equalization as allowed by § 174.325, the hopper dredge's metacentric height must be at least 2 inches (50mm) when the dredge is in an upright position. | ||||
| 46:46:7.0.1.2.9.9.61.6 | 46 | Shipping | I | S | 174 | PART 174—SPECIAL RULES PERTAINING TO SPECIFIC VESSEL TYPES | I | Subpart I—Hopper Dredges With Working Freeboard Assignments | § 174.325 Equalization. | USCG | When doing the calculations required by § 174.310 of this subpart— (a) Equalization arrangements requiring mechanical aids, such as valves, may not be assumed to be effective in reducing the angle of heel; and (b) Spaces joined by ducts may be assumed to be common spaces only if equalization takes place within 15 minutes after flooding begins. | ||||
| 46:46:7.0.1.2.9.9.61.7 | 46 | Shipping | I | S | 174 | PART 174—SPECIAL RULES PERTAINING TO SPECIFIC VESSEL TYPES | I | Subpart I—Hopper Dredges With Working Freeboard Assignments | § 174.330 Jettisoning of spoil. | USCG | (a) When doing the calculations required by § 174.310 for a hopper dredge with bottom doors, it may be assumed that the spoil is jettisoned immediately after damage and that the bottom doors remain open if: (1) The bottom doors are designed so that they may be fully opened from: (i) The closed position within two minutes even if the main power source is lost or the bottom door actuating mechanism is damaged; and (ii) The navigating bridge; (2) The discharge area through the bottom doors is equal to or greater than 30 percent of the maximum cross sectional area of the hopper measured in a plane parallel to the waterline; and (3) Asymmetrical jettisoning of the spoil is impossible. (b) When doing the calculations required by § 174.310 for a hopper dredge with a split hull, it may be assumed that the spoil is jettisoned immediately after damage if— (1) The hull is designed so that— (i) The complete separation is effected within two minutes even if the main power source is lost or the actuating means is damaged; and (ii) The actuating means can be operated from the navigating bridge; (2) It is shown to the Commanding Officer, Marine Safety Center, either by calculations or by operational tests, that the hulls can separate sufficiently to allow the dredged material to dump without bridging; and (3) Asymmetrical jettisoning of the spoil is impossible. | ||||
| 46:46:7.0.1.2.9.9.62.8 | 46 | Shipping | I | S | 174 | PART 174—SPECIAL RULES PERTAINING TO SPECIFIC VESSEL TYPES | I | Subpart I—Hopper Dredges With Working Freeboard Assignments | § 174.335 Watertight doors. | USCG | [CGD 76-080, 54 FR 36977, Sept. 6, 1989, as amended by CGD 95-072, 60 FR 50468, Sept. 29, 1995] | (a) Each hopper dredge must have sliding watertight doors (Class 3) approved under § 170.270 of this chapter if the sill for the door is— (1) Installed below the bulkhead deck; and (2) Less than 24 inches above the final waterline as shown by the calculations required by § 174.310 in each damage condition up to and including the maximum amount of assumed damage. (b) Each hopper dredge must have sliding watertight doors (Class 3) approved under § 170.270 of this chapter, or quick acting hinged watertight doors (Class 1) approved under the same subpart if the sill of the watertight door is— (1) Installed below the bulkhead deck; and (2) Greater than 24 inches above the final waterline as shown by the calculations required by § 174.310 in each damage condition up to and including the maximum amount of assumed damage. | |||
| 46:46:7.0.1.2.9.9.62.9 | 46 | Shipping | I | S | 174 | PART 174—SPECIAL RULES PERTAINING TO SPECIFIC VESSEL TYPES | I | Subpart I—Hopper Dredges With Working Freeboard Assignments | § 174.340 Collision bulkhead. | USCG | Each hopper dredge must have a collision bulkhead that is located not less than 5 percent of the length abaft of the forward perpendicular. |
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