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USCG Documented Vessel

SEA SUB II

No. 631687Passenger (Inspected)Valid
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
631687
Call sign
WDI6723
Flag
Us
Service
Passenger (Inspected)
Self-propelled
Yes
Propulsion
Diesel Reduction
Hull material
Aluminum
Year built
1981

Dimensions & tonnage

Length
40.1 ft
Breadth
12 ft
Depth
4.9 ft
Gross tonnage
17 GT
Net tonnage
11 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
May 21, 2026
Expires
May 31, 2027
Endorsements
Coastwise Unrestricted

Builder

Builder
Lafco
Shipyard
Lafco
Built at
Lafayette, La, United States
Year built
1981

Hailing port

Hailing port
St Petersburg, Fl, United States
Managing owner (company)
Sea Sub Systems Offshore Services INC
Managing owner location
Seminole, Fl

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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Sea Sub II — USCG Documented Vessel 631687 · CaptainsGround