46 CFR 11.309: STCW endorsement as OICNW, 500 GT or more
Last reviewed: October 14, 2026
This section sets what an applicant must show to get an STCW endorsement as Officer in Charge of a Navigational Watch (OICNW) of vessels of 500 GT or more. The applicant must show seagoing service, bridge watchkeeping, the standard of competence and approved training. It also covers renewals, exemptions and entry from national endorsements.
Applies toApplicants for an STCW endorsement as Officer in Charge of a Navigational Watch of vessels of 500 GT or more.
What it says
An applicant must show thirty-six months of seagoing service in the deck department on vessels operating in oceans, near-coastal waters, and/or Great Lakes, unless the applicant uses the approved training program option.
46 CFR 11.309(a)(1)(i)“Thirty-six months of seagoing service in the deck department on vessels operating in oceans, near-coastal waters, and/or Great Lakes.”
Service on inland waters, bays, or sounds that are navigable waters of the United States may be substituted for up to 50 percent of the total required service.
46 CFR 11.309(a)(1)(i)“Service on inland waters, bays, or sounds that are navigable waters of the United States may be substituted for up to 50 percent of the total required service”
As an alternative, an applicant may show twelve months of seagoing service as part of an approved training program that includes onboard training meeting Section A-II/1 of the STCW Code.
46 CFR 11.309(a)(1)(ii)“Twelve months of seagoing service as part of an approved training program, which includes onboard training that meets the requirements of Section A-II/1 of the STCW Code”
An applicant must show bridge watchkeeping duties of not less than 6 months, performed during the required seagoing service under the supervision of an officer holding the STCW endorsement as Master, Chief Mate, Second Mate, or OICNW.
46 CFR 11.309(a)(2)“bridge watchkeeping duties under the supervision of an officer holding the STCW endorsement as Master, Chief Mate, Second Mate, or OICNW, for a period of not less than 6 months”
An applicant must show evidence of meeting the standard of competence specified in Section A-II/1 of the STCW Code.
46 CFR 11.309(a)(3)“Provide evidence of meeting the standard of competence specified in Section A-II/1 of the STCW Code”
Experience in the engine department may be creditable for up to 3 months of the service requirements in paragraph (a)(1)(i) of this section.
46 CFR 11.309(b)“Experience gained in the engine department on vessels may be creditable for up to 3 months of the service requirements in paragraph (a)(1)(i) of this section.”
For a renewal to be valid on or after January 1, 2017, each candidate must show competence in leadership and teamworking skills and, if serving on a vessel with this equipment, completed approved ECDIS training.
46 CFR 11.309(c)“For a renewal of an STCW endorsement as OICNW of vessels of 500 GT or more to be valid on or after January 1, 2017, each candidate must provide the following:”
The Coast Guard may exempt an applicant from individual knowledge, understanding, and proficiency required in Section A-II/1 of the STCW Code, and the credential may then include a corresponding limitation.
46 CFR 11.309(d)“The Coast Guard may exempt an applicant from meeting any individual knowledge, understanding, and proficiency required in Section A-II/1 of the STCW Code.”
Common questions
How much sea service do I need for an STCW OICNW endorsement?
You need thirty-six months of seagoing service in the deck department, or twelve months of seagoing service as part of an approved training program.
“Thirty-six months of seagoing service in the deck department on vessels operating in oceans, near-coastal waters, and/or Great Lakes.”
Can engine department time count toward OICNW sea service?
Yes. Engine department experience may be creditable for up to 3 months of the service requirements in paragraph (a)(1)(i) of this section.
“Experience gained in the engine department on vessels may be creditable for up to 3 months of the service requirements in paragraph (a)(1)(i) of this section.”
How much bridge watchkeeping is required for OICNW?
The applicant must show bridge watchkeeping duties of not less than 6 months during the required seagoing service, under the supervision of a qualifying officer.
“bridge watchkeeping duties under the supervision of an officer holding the STCW endorsement as Master, Chief Mate, Second Mate, or OICNW, for a period of not less than 6 months”
Can the Coast Guard exempt me from parts of the OICNW standard of competence?
Yes. The Coast Guard may exempt an applicant from individual knowledge, understanding, and proficiency required in Section A-II/1 of the STCW Code, and the credential may include a corresponding limitation.
“These exemptions must be approved by the Coast Guard based upon vessel type.”
The text of 46 CFR 11.309
Electronic Code of Federal Regulations (eCFR), current as of October 1, 2026 · Read it on eCFR
Requirements to qualify for an STCW endorsement as Officer in Charge of a Navigational Watch of vessels of 500 GT or more (operational level)
Link to an amendment published at 91 FR 60882, Sept. 25, 2026.
(a) To qualify for an STCW endorsement as Officer in Charge of a Navigational Watch (OICNW), an applicant must—
(1) Provide evidence of seagoing service as follows:
(i) Thirty-six months of seagoing service in the deck department on vessels operating in oceans, near-coastal waters, and/or Great Lakes. Service on inland waters, bays, or sounds that are navigable waters of the United States may be substituted for up to 50 percent of the total required service; or
(ii) Twelve months of seagoing service as part of an approved training program, which includes onboard training that meets the requirements of Section A-II/1 of the STCW Code (incorporated by reference, see § 11.102);
(2) Provide evidence of having performed, during the required seagoing service, bridge watchkeeping duties under the supervision of an officer holding the STCW endorsement as Master, Chief Mate, Second Mate, or OICNW, for a period of not less than 6 months;
(3) Provide evidence of meeting the standard of competence specified in Section A-II/1 of the STCW Code; and
(4) Provide evidence of having satisfactorily completed approved training in the following subject areas:
(i) Medical First-aid Provider.
(ii) Radar Observer.
(iii) Search and rescue.
(iv) Basic and Advanced Firefighting in accordance with § 11.303.
(v) Proficiency in Survival Craft and Rescue Boats other than Fast Rescue Boats (PSC) or Proficiency in Survival Craft and Rescue Boats other than Lifeboats and Fast Rescue Boats (PSC-Limited).
(vi) Visual signaling.
(vii) Bridge resource management (BRM).
(viii) Terrestrial and celestial navigation, and electronic navigation systems.
(ix) Watchkeeping, including International Regulations for Preventing Collisions at Sea (COLREGS) and IMO standard marine communication phrases (SMCP).
(x) Cargo handling and stowage.
(xi) Ship handling.
(xii) Stability and ship construction.
(xiii) Meteorology.
(xiv) ARPA, if serving on a vessel with this equipment.
(xv) GMDSS, if serving on a vessel with this equipment.
(xvi) ECDIS, if serving on a vessel with this equipment.
(b) Experience gained in the engine department on vessels may be creditable for up to 3 months of the service requirements in paragraph (a)(1)(i) of this section.
(c) For a renewal of an STCW endorsement as OICNW of vessels of 500 GT or more to be valid on or after January 1, 2017, each candidate must provide the following:
(1) Evidence of meeting the standard of competence in leadership and teamworking skills.
(2) Completion of approved training in ECDIS, if serving on a vessel with this equipment.
(d) The Coast Guard may exempt an applicant from meeting any individual knowledge, understanding, and proficiency required in Section A-II/1 of the STCW Code. These exemptions must be approved by the Coast Guard based upon vessel type. Under these circumstances, the credential may include a corresponding limitation.
(e) Seafarers with one of the following national officer endorsements are eligible to apply for this endorsement upon completion of the requirements in the following table:
Table 1 to § 11.309(e)—STCW Endorsement as OICNW of Vessels of 500 GT or More Entry path from national endorsements Sea service under authority of the endorsement 1 Competence— STCW Table A-II/1 2 Training required by this section 3 Mate ocean or near-coastal, unlimited tonnage None Yes Yes. Master ocean or near-coastal, less than 500 GRT 6 months Yes Yes. Mate ocean or near-coastal, less than 1,600 GRT None Yes Yes. Mate ocean or near-coastal, less than 500 GRT 12 months Yes Yes. Mate OSV 12 months1 Yes Yes. Mate of Towing Vessels ocean or near-coastal 6 months Yes Yes. 1 This column provides the minimum additional service required of the seafarer in order to meet the requirements of this section. 2 Complete any items in paragraph (a)(3) of this section not previously satisfied. 3 Complete any items in paragraph (a)(4) of this section not previously satisfied.
Sections it refers to
The plain-English explanation on this page was written with AI from the regulation text above and checked automatically before publishing: every quote appears in the text, every number comes from it, and a second model confirmed each statement adds nothing the text doesn't say. Regulation text current as of October 1, 2026. The regulation text governs. RegKnot is not affiliated with the U.S. Coast Guard.