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Carrying up to 18 divers in incredibly spacious, luxurious surroundings, MV Argo is bright & inviting and provides that famous Undersea Hunter Fleet safety, stability & workhorse power.

 A word from Dom :  "Unquestionably one of the finest expedition boats in the world. Everything is first-class - comfort, space, stability, crew and diving. Plus, she's the home of the DeepSee submersible. The entire Undersea Hunter Group gets a huge thumbs up from us here at Dive Advice, with the Argo, flagship of the fleet, being as good as it gets."..... Dominick Macan


  • mv argo stern sailing opt
    stern view
  • sundeck opt
    sun deck
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    sun deck
  • drinks opt
    exterior dining
  • Argo salon opt
    salon - main deck
  • argo diningroom opt
    dining area
  • upper lounge opt
    upper lounge - bridge deck
  • Argo double cabin opt
    double cabin
  • cabin 2 opt
    twin cabin
  • Argo dive deck opt
    dive deck
  • camera storage argo opt
    camera storage
  • mv argo and deepsee opt
    Deepsee Sub
  • mv argo side view rock opt
    side view rock background

  •  3 upper deck DOUBLE cabins
    with queen bed & picture windows
    3 lower deck TWIN cabins
    2 twin beds & portholes 
    3 lower deck DOUBLE cabins
    queen bed & portholes
    All cabins have private bathroom, individual AC controls plus a flat screen TV/DVD player. 

  • all diving is done from skiffs
    12  liter aluminium tanks (15 liter for rent)  .... standard yoke (INT), not DIN
    (adaptor available by advance request)
     nitrox & rebreather friendly
    scuba rental gear available (request in advance)
    water temperature: 79 F to 84 F (26 C to 29 C)
    Advanced Open Water Diver certification & minimum of 25 hrs diving experience

  • full rebreather support
    tri-mix support with helium
    an assortment of bail-out & rebreather cylinders
    support for all types of totally closed-circuit rebreathers (CCR)
    (EG Biomarine & Buddy Inspiration units with Sofnolime CO₂)
    scrubber material & high-pressure oxygen
    certain tanks available for rental (request in advance)

  • accomodation, meals and non-alcoholic beverages
    3 to 4 dives per day
    tanks and weights
    nitrox fills
    transfers from & to a hotel in San Jose

  • international airfares
    alcoholic beverages
    National Park Fee + possible fuel surcharge
    rebreather service & tanks  (divers need to bring their own rebreathers)
    scuba rental gear & 15 liter tanks
     DeepSee submersible (on-board certain trips) 
    satellite phone calls


The Argo is a rock-solid open-water vessel which was introduced into the Undersea Hunter group in 2009. She is a 130-foot vessel (40-meter) with full global reach and was conceived to serve as platform for a deep-diving submersible.  Argo offers all the technical support required for film and research expeditions, and extended, multi-task cruises are her specialty, but she transitions smoothly into her role of luxury dive yacht when not doing exotic film & research work.


The partially covered top sun deck with lounge chairs provides down-time options for both sun lovers and the more cautious amongst you !  When conditions permit, this is also where al-fresco dining is found.  Just below,on the upper deck (bridge deck)  you'll find 3 of the large & exceptionally lovely cabins as well as a comfortable salon complete with sofas, desks, computer and entertainment system ... and yet another sun deck.  You'll never be short of places to escape to during your non-diving hours.

The elegant main lounge and formal dining area is located one level down on the main deck. Also on this deck, at the stern of the vessel, is the enormous dive deck  ... while the bow of the boat is designed specifically for observation of animal migration & antics. The remainder of the cabins are located on the lower deck and the ambience is completed with original, undersea themed artwork throughout. The well-equipped galley enables the ship's chefs to prepare fresh, international level, four-star cuisine ... and outdoor dining can be arranged when conditions permit.

Between dives or when time permits, guests are welcome use the sea kayaks, go for a swim, snorkel around the boat. On the way to or from the planned dive sites it is very common for the skiff drivers to seek out the best spots for memorable surface experiences ... to watch dolphins, mantas, whales, a promising bait-ball or just cruse up to some of the islands most beautiful attractions, which are only reachable by small skiff.

And, you'll have a satellite telephone for international calls, a satellite connection to send and receive e-mails.


View the deck & cabin layout, the yacht specifications, the equipment & safety features for MV Argo    ....  open for details



COCOS ARGO deck plan opt 


Length: 129 ft / 39 m
Beam: 26 ft / 8 m
Draft: 12.5 ft / 3.8 m
Displacement: 205 tons
Construction: Steel
Cruising Speed: 10 knots
Maximum Speed: 11 knots
Range: 4000 Nautical Miles
Endurance: 20 days
Tenders: Dive support: 3 x Privateer 24 ft. (with twin 115 HP outboards)
Fuel Tank: 15.000 gallons US
Water Tank: 11.000 gallons US

Miscellaneous: DEEP SEE SUBMERSIBLE: 3 Person, one atmosphere, 1500 ft rated submersible, ABS approved and certified with Schilling Orion manipulator/robotic arm.


Generators: 2 CAT 3304 PCNA (75kw and 65kw) 208 VAC, 3 Phase generators 1 portable generator 5kw
Bow Thruster: 360 bow thruster ( Perkins T6 240 HP )
Engines: CAT D398TA; 634 kW (850 hp) @ 1225 rpm
Hydraulic Power Pak: GM 12-71 ( 350HP )
Crane: 15 ton,
Telescopic marine crane w/50 ft. reach
Stern A-Frame: 10 long tons, 5 X 1000 lb.
Hydraulic winches
Anchor winch 5000 lb.
Pull winch with 800 ft. 7/8 cable
Scuba Compressors: LP 280 Nitrox Membrane System 2 Bauer HP Compressors H13-E3
Scuba Tanks: 30 tanks 80 cu.ft. Aluminum 100 cu.ft. Steel tanks (Advanced Reservations Required)
Technical Diving: Full oxygen, nitrox and rebreather service, passengers must bring their own rebreathers.


3 GPS (Global Positioning Systems
2 Radars (48 mile)
2 recording fathometers
Radio Direction Finder
SIMRAD Auto pilot


2 VHF radios
3 handheld VHF radios, SSB radio (SEA 222)
Multi-system televisions,
Multimedia Desktop Computer Starlit phone


2 x 25-person life rafts.
Complete boat, crew and passenger safety gear
Firefighting system throughout vessel
Extensive first aid kit
20 personal diver locator systems


The incredible, the fabulous, the one-of-a-kind DeepSee submersible is most frequently teamed with this vessel. See DeepSee for all the information you need about "going for a ride" into the abyss.

DeepSee NEW 2014 opt


Costa Rica has two international airports but we recommend that you fly to San José (SJO).  Upon arrival in San Jose, take a taxi to your hotel. There are always taxis available at the airport and minivans for those of you who have a lot of gear. The night before departure, an Undersea Hunter representative will let you know your precise pickup time (generally between 8 AM and 1 PM) for transport to the dock.  The drive to Puntarenas, where you will board, takes about 3 hours, including a stop on the way for a snack or lunch. The price of this meal is not included in your trip package. After boarding, the vessel will take 32-36 hours to reach Cocos Island.

Generally, there are two dives scheduled for the morning, 8 AM and 11 AM and another dive after lunch, around 2.30 PM. This schedule can vary depending on events, circumstances and opportunities that may present themselves.

At the end of your Cocos adventure, you will usually disembark the boat at 8 AM and be transferred back to a hotel in San Jose. The transfer takes approximately 2 hours.


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