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USCG Documented Vessel

KOYUK

No. 503189Towing VesselValid
Data as of · Source: U.S. Coast Guard
Every answer cited & verifiedAll 4 USCG exam modulesReviewed by a former NMC exam writer

Vessel particulars

Official number
503189
Call sign
WDK9372
Flag
Us
Service
Towing Vessel
Self-propelled
Yes
Propulsion
Diesel Reduction
Hull material
Aluminum
Year built
1966

Dimensions & tonnage

Length
74.8 ft
Breadth
24 ft
Depth
5.2 ft
Gross tonnage
86 GT
Net tonnage
74 NT

Documentation

A Certificate of Documentation (COD) is the U.S. Coast Guard’s federal record of a vessel’s nationality and ownership — a national alternative to state titling for eligible vessels. Learn how it differs from state registration in the registration vs documentation guide.

COD status
Valid
Issued
June 3, 2026
Expires
June 30, 2027
Endorsements
Coastwise UnrestrictedRegistry

Builder

Builder
Marine Constrctn & Design
Shipyard
Marine Constrctn & Design
Built at
Seattle, Wa, United States
Year built
1966

Hailing port

Hailing port
Kotzebue, Ak, United States
Managing owner (company)
Nana Construction LLC
Managing owner location
Anchorage, Ak

Planning to run this boat as a charter or take paying passengers? Carrying up to six for hire needs an OUPV “six-pack” captain’s license.

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Independent reference tool — not affiliated with, endorsed by, or sponsored by the U.S. Coast Guard or the National Maritime Center. Vessel data is derived from public USCG sources and may lag official records; always verify with the issuing authority.

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Koyuk — USCG Documented Vessel 503189 · CaptainsGround