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USCG Documented Vessel

JOHANNA

No. 510471Towing 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
510471
Call sign
WDH8963
Flag
Us
Service
Towing Vessel
Self-propelled
Yes
Propulsion
Diesel Reduction
Hull material
Steel
Year built
1966

Dimensions & tonnage

Length
56.4 ft
Breadth
21 ft
Depth
6.1 ft
Gross tonnage
75 GT
Net tonnage
51 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
February 12, 2026
Expires
February 28, 2027
Endorsements
Coastwise Unrestricted

Builder

Builder
Humboldt Boat Service
Shipyard
Humboldt Boat Service
Built at
St. Louis, Mo, United States
Year built
1966

Hailing port

Hailing port
St Louis, Mo, United States
Managing owner (company)
W.A. Ellis Construction Company
Managing owner location
Independence, Mo

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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Johanna — USCG Documented Vessel 510471 · CaptainsGround