The world‘s finest diving


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, diving … and, oh,yes ! the food. To add just an extra touch of magic, she’s the home of the DeepSee submersible. Everything about this experience gets a huge thumbs up from us. The spectacular Argo is good as a liveaboard gets.” Dominick Macan

mv argo Ext1 opt

On Board Argo

3 upper deck DOUBLE / TWIN cabins
with queen bed (+ optional twin bunk) & picture windows
3 lower deck TWIN cabins
2 twin beds & portholes
3 lower deck DOUBLE / TWIN cabins
queen bed (+ optional twin bunk) & portholes

All have private bathroom, individual AC controls, a flat screen TV/DVD player & individually themed artwork.

all diving is done from skiffs
12 liter aluminium tanks (15 liter for rent) …. standard yoke (INT)
(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

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

TECHNICAL DIVING: 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

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)

Upscale & Elegant For Your Diving Pleasure

The partially covered top sun deck with lounge chairs provides down-time options & when conditions permit, this is where al-fresco dining is found. Just below,on the upper deck (bridge deck) you’ll find 3 of the large & lovely cabins as well as a comfortable salon complete with sofas, desks, computer, entertainment system … and yet another sun deck.

The elegant main lounge & formal dining area is located on the main deck. At the stern on this deck is the enormous dive deck … while the bow of the boat is designed for observation of animal migration & antics. The remaining cabins are on the lower deck. All cabins have original, undersea themed artwork.

The ship’s chefs prepare fresh & exceptional international cuisine.

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 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.

Your Cruise Logistics

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.

Layout & Specs

Deck & cabin layout, yacht specifications, equipment & safety features
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

Itinerary & Maps

Get a feeling for the dive sites and animals you can expect to see.

Your diving at Cocos Island will include as many of the exhilarating Cocos sites as time and weather permit.

Manuelita:  Whitetips, marble rays, manta rays, eagle rays, turtles, black tips, garden eels

Manuelita Outsite: Hammerheads, black tips, white tips, eagle rays, manta rays, yellow fin tunas, turtles, jacks, and whale sharks.

Viking Rock: Hammerheads, white tips, eagle rays, turtles

Dirty Rock: Hammerheads, white tips, black tips, marble rays, eagle rays, mobula rays, jacks, turtles, dolphins, and whale sharks

Punta Maria: Hammerheads, Galapagos sharks, whitetip reef sharks, blacktip sharks, marble rays, octopus, and eels

Big Dos Amigos: White tips, marble rays, hammerheads, mobula rays

Bait Ball: Green jacks, yellowtail grunts, rainbow runner, silky sharks, blacktip sharks, dolphins and tunas

Bajo Dos Amigos: Hammerheads, mobula rays, manta rays, eagle rays, sailfish, wahoos, black coral

Bajo Alcyone: Hammerheads, white tips, black tips, whale sharks, marble rays, eagle rays, mobula rays, manta rays, turtles, yellow fin tuna, silkies, sailfish, wahoos, dolphins

Lobster Rock: White tips, marble rays, manta rays, eagle rays, red lip batfish, frogfish, garden eels


Home Of The Deepsee Submersible

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.

Rugged & Robust For Scientific Exploration

The Argo is a rock-solid open-water vessel (130 feet / 40 meters) with full global reach which was conceived to serve as platform for a deep-diving submersible.  Argo offers all the technical support required for film and research expeditions.   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.

DeepSee NEW 1050 opt


There is currently no availability information for this liveaboard. Please enquire for details.

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