cocos hammerhead shark

Okeanos Aggressor I

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Okeanos Aggressor I is a 110' yacht, built and powered for comfort, safety and stability on the crossing to Cocos.  She's been doing the Cocos run since 1988 in that typical Aggressor style.

"My very first trip to Cocos was in 1988 ... on the maiden voyage of Okeanos I to Cocos Island!   She was stable, comfortable and efficient then .... and remains so today.  The always excellent Aggressor standards will be a part of your unforgettable journey on the Okeanos I.  And, the diving, of course, will astonish you."   ...   Dominick Macan

Spaces, rates & booking on Live Search

Vessel & diving details

  • The Okeanos Aggressor can accomodate a maximum of 22 guests in 10 cabins

    • 3 cabins on the upper deck with double bed & single upper berth plus picture window
    • 1 cabin on the lower deck with double bed & single upper berth
    • 4 cabins on the lower deck with upper & lower twins
    • 1 quad cabin on the lower deck with 2 double beds & two twin berths

     All cabins have en-suite bathrooms and a personal TV/DVD combo in each.   Lower deck cabins have portholes.

  • Diving Amenities:

    • up to 4 dives per day
    • 80 cubic foot tanks (+ a limited number of 15 liter tanks)
    • K valves (American type), no DIN (European) valves
    • each panga is 22 feet in length with ample space for camera equipment & a divemaster on each panga for every dive
    • GPS locator provided free of charge which provides the coordination center with a web link to your location
  • Included in all cruises
    • accommodation, meals & snacks
    • non-alcoholic and local alcoholic beverages
    • transportation from a San Jose host hotels (there are two) to Puntarenas on day of arrival and departure
    • oxygen, weights, belts
  • Extras incllude:
    • national park fee, fuel surcharge, departure tax
    • unlimited nitrox fills at 32% are $150 
for 10 nights
    • rental gear (regulators, BCs, dive computers & night lights - to be reserved in advance)
    • limited number of 15-liter tanks available for additional cost with advance reservation

Cocos Okeanos Aggressor Interior Set

Technical specifications & deck plan

See detailed yacht specifications, equipment & safety features plus the deck layout for Okeanos Aggressor I ...   click to open


Built to Lloyd’s Registry and American Bureau of Shipping Standards
Length: 110 ft.
Beam: 24 ft
Passengers: 22
Crew: 8
Cabins 10


Captains and staff are professionally licensed as required by the laws of the country in which the yacht operates and complies with and the appropriate flag state regulations and/or SOLAS (International Convention for the Safety of Life at Sea) standards. All yachts are required to follow Aggressor Fleet® Standard Operations Procedures (SOP). Dive instructors and divemasters are trained and certified by international recognized certification agencies. Each receives proficiency training and annual inspections to review safety aspects.


Twin diesel engines on all steel and aluminum yachts
Two or more generators, 110-208 ac voltage, each capable of supplying the yachts needs independently
Two SCUBA air compressors with cascade storage
Nitrox membrane system with cascade storage
Watermaker with ample storage
Support dinghies with outboard motors for shore excursions and scuba diving


Magnetic Compass
Depth sounders
Global Positioning Systems (GPS)


Multiple VHF radios
Long Range Single Side Band Radio
Satellite Phone (where necessary)
Satellite Email (where necessary)


Hang bar for safety stops (where necessary)
Complete First Aid Kit and medical supplies
D.A.N. Oxygen System with 100% demand regulator
Automatic External Defibrillator (AED)
Fire and Smoke Detection Systems
Fire extinguishers and Fire Fighting Equipment
EPIRB – Emergency Position Indicating Radio Beacon
Life rafts & rescue craft
Life jackets equipped with lights and whistles for all passengers and crew
Full Complement of Safety and Rescue Equipment
Emergency flares

 Okeanos AggressorI Deckplan 780


Large, Solid, Stable for long crossings

Okeanos Aggressor I is a great way to make the 36 hour crossing to Cocos Island.   You'll find plenty to do during the journey.  The salon features a complete entertainment system, including iPod speaker system and a large assortment of films to choose from.

While traveling and once you've reached the island,  you can enjoy 40 feet of covered or open sundeck with chaise lounges, deck chairs, wet bar & grill. 

Of course, you'll find plenty of room for your gear and a complete photo center for photographers.

Email is available onboard through the satellite system. There is a charge for incoming and outgoing email. Private calls may be made from the yacht. There is a cell tower in Wafer Bay with ternational reception while anchored during the charter.

Typical Aggressor cuisine - you never go hungry

Meals are served in the dining room.  Menus are varied and include barbecues and local & international cuisine. For breakfast you'll find fresh fruits, hot entrees, cereals and juices. Lunches are buffet-style, featuring hot soups, homemade breads, salads and sandwiches and/or entrees. Dinners are diverse, including seafood, beef or chicken with homemade desserts to top off the meal.

Soft drinks, ice tea, beer, and wine are complimentary.

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