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USCG Documented Vessel

CALLISTO EXPLORER

No. 520611Research 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
520611
IMO number
8978655
Call sign
WDE5056
Flag
Us
Service
Research Vessel
Self-propelled
Yes
Propulsion
Diesel Reduction
Hull material
Steel
Year built
1969

Dimensions & tonnage

Length
103.7 ft
Breadth
21 ft
Depth
7.6 ft
Gross tonnage
98 GT
Net tonnage
71 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 4, 2026
Expires
May 31, 2027
Endorsements
Coastwise UnrestrictedRegistry

Builder

Builder
Blount Marine Corp
Shipyard
Blount Marine Corp
Built at
Warren, Ri, United States
Year built
1969

Hailing port

Hailing port
Juneau, Ak, United States
Managing owner (company)
Cogignition 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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Callisto Explorer — USCG Documented Vessel 520611 · CaptainsGround