The world‘s finest diving

Okeanos Aggressor I

Okeanos Aggressor I is a stable & comfortable 34-meter (110-foot) yacht . She takes 22 divers & has been successfully doing the Cocos run since 1988 in that typical Aggressor style.

A word from Dom : “My very first trip to Cocos was in 1988 … on the maiden voyage of Okeanos I. She was stable, comfortable and efficient then …. and remains so today. The dependable Aggressor standards will be a part of your journey on the Okeanos I …. and diving Cocos, it goes without saying, will be simply unforgettable.” Dominick Macan

Okeanos I 1050 opt

On Board Okeanos Aggressor I

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

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: 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)

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)

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 to keep you occupied or totally relaxed, as you wish. For starters, you can enjoy the 40 feet of partially covered sundeck with chaise lounges which crowns the boat, perfect for recuperating after invigorating dives. Below that, on the upper deck, you’ll find even more deck space, at the bow and at the rear, where you find deck chairs, wet bar & grill . On this deck, you also find 3 very spacious staterooms. The main deck features a large salon with complete entertainment system, including iPod speaker system and a large assortment of films to choose from and a separate dining area … in addition to the roomy dive deck. On the lower deck are the remaining cabins.

Of course, you’ll find plenty of space 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 international reception while anchored during the charter.

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 and dinners include seafood, beef or chicken with homemade desserts to top off the meal. Soft drinks, ice tea, beer, and wine are complimentary.

Deepsee Submersible

All yacht departures are from Puntarenas, Costa Rica. Guests need to arrive the day before the charter start date and overnight in San Jose, Costa Rica. You may choose to stay at one of the recommended host hotels (Holiday Inn Escazu or Holiday Inn Express Forum) or at another hotel of your choice. Please note that pick-ups for transfer to the boat are only from these two hotels. You will be met by an Aggressor representative on the day of departure at a pre-set time for the group transfer.

Boarding depends on the tide schedule. Immediately after boarding the yacht departs for its crossing to Cocos Island. The crossing takes roughly 36 hours and you can expect to arrive at the island around dawn on Day 3.

After a full seven days of diving, the Okeanos Aggressor II returns back to the dock in Puntarenas and you will be taken back to San Jose.

Layout & Specs

Deck plan & cabin layout … yacht specifications, equipment & safety features
OA Yacht Layout XL opt


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 dive masters 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

Itinerary & Maps

The itinerary for Okeanos Aggressor I is Cocos, Cocos, Cocos …. only Cocos … in all its glory.

Itnerary description and itinerary map

Cocos Island – 10-night sample itinerary
Day 1 – meet in front of host hotel. Transfer to Puntarenas for boarding and departure for Cocos Island.
Day 2-3 – arrive Cocos Island, diving begins.
Day 4-9 – diving days
Day 9-10 – travel back to Puntarenas.
Day 11 – check out at 7 am and transfer to San Jose Airport or host hotels.

Cocos Top Dive Sites
A 600’ long submerged mountain, the top of the mountain is 75’ from the surface. Schooling hammerheads, mantas and schooling fish. Possible sailfish or marlin.
Big Dos Amigos
This islet features a 45-foot-high arch and 60-foot pinnacle off the southeast side. Look for rainbow runners, yellowtail snapper, bigeye jacks and lobster. Hammerheads swim between the pinnacle and arch.
Bird Island, Chatham Bay
Dove from Chatham Bay, southeast of Manuelita, this site provides a variety of marine life including Frog Fish, lobsters, morays, rays, white tip sharks and hammerheads. There is even a cleaning station.
Dirty Rock
A large island with schools of marble rays and hammerheads.
Lone Stone
Schooling marble rays and mobula rays.
The northeast corner has asheer wall. Lots of White Tips, Marble Rays and schools of Creoles. Possible sightings: whale sharks, mating eagle rays, sail fish, mating white tip sharks, false killer whales.
Ubing Rock, Wafer Bay
This 300’ rock begins at 20’ and drops to a 110’ sandy bottom. The southeast slope attracts schooling hammerheads.

Cocos Island XL map b opt


Contact us for information about schedules and booking

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