Americas · Vessel profile

Argo

Steel expedition liveaboard with nine cabins. Currently assigned to National Geographic Pristine Seas research and unavailable for Cocos dive bookings.

Costa Rica

Published operator: Undersea Hunter Group [1]

On National Geographic Pristine Seas global expedition; unavailable for Cocos bookings

Length
39 m
Guests
18
Cabins
9

Research reviewed 2026-10-19.

Argo — vessel photograph
Vessel photograph · Vessel photograph supplied on the operator website

Published specifications

Vessel type
Dive liveaboard and research expedition vessel
Published status
On National Geographic Pristine Seas global expedition; unavailable for Cocos bookings
Length
39 m [1]
Guests
18 [1]
Guest cabins
9 [1]
Crew
12 [1]
Hull
Steel [1]
Speed
10 kn [1]
Nitrox
Nitrox membrane system; oxygen and rebreather support published [1]

Contact and booking links

Links lead to third-party operators or agents. This directory does not confirm departures or accept bookings.

On board

  • Air-conditioned ensuite cabins
  • Satellite telephone
  • Camera storage and charging

Diving facilities

  • Dive skiffs
  • Two Bauer compressors
  • Camera rinse tanks

Published safety equipment

  • GPS
  • Radar
  • Life rafts
  • First aid kit
  • Diver locator systems
  • Firefighting system

Source-linked research

The published details below include historical records and conflicting claims, with their original sources retained.

Published research for Argo
DetailPublished information and source
OperatorUndersea Hunter Group [1]
Operator websitehttps://underseahunter.com/ [1]
Vessel typeDive liveaboard and research expedition vessel [1]
Operating statusOn National Geographic Pristine Seas global expedition; unavailable for Cocos bookings [1]
Length (m)39 [1]
Hull constructionSteel [1]
Maximum guests18 [1]
Guest cabins9 [1]
Crew12 [1]
Cruising speed (kn)10 [1]
NitroxNitrox membrane system; oxygen and rebreather support published [1]
AmenitiesAir-conditioned ensuite cabins; Satellite telephone; Camera storage and charging [1]
Diving facilitiesDive skiffs; Two Bauer compressors; Camera rinse tanks [1]
Safety equipmentGPS; Radar; Life rafts; First aid kit; Diver locator systems; Firefighting system [1]
Business emailinfo@underseahunter.com [1]
Business telephone+506 2228 6613 [1]
Length discrepancySpecification table lists 129 ft / 39 m; introduction rounds to 130 ft / 40 m. Normalized value follows the specification table. [1]
Research deploymentOperator states Argo is on a global National Geographic Pristine Seas expedition and unavailable at Cocos for the foreseeable future. [1]
Retired submersibleThe operator states the DeepSee submersible has retired from service. [1]
Photograph sourcehttps://underseahunter.com/wp-content/uploads/2022/03/Argo_home.jpg [2]

Sources

  1. Undersea Hunter — Argo specifications and current expedition statusoperator · accessed 2026-10-19
  2. Undersea Hunter — fleet overview and Argo photographoperator · accessed 2026-10-19