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Okeanos Aggressor I

Cocos liveaboard

Operated by the Aggressor Fleet who are renowned for their incredible service and standards, the 33m Okeanos Aggressor accommodates a maximum of 22 guests in 10 spacious cabins and offers 4 and 10 night itineraries to the UNESCO World Heritage-listed Cocos Island National Park.

Situated 342 miles off the Pacific Coast of Costa Rica, Cocos Island is one of the few remaining dive destinations where you can expect to see large numbers of pelagic fish life, with huge schools of hammerhead sharks, eagle rays, mantas, turtles white tip reef sharks, mobula rays and silky sharks with the occasional sightings of whale sharks, marlin, bottlenose dolphins, sailfish and false killer whales. 

To find out more about this area, visit our Cocos page.

Getting there
For all trips to dive Cocos Island you will need to fly into San Jose, in Costa Rica. There are many airlines servicing this route from the UK including direct flights with British Airways, which takes approximately 11 hours.

You will need to take one night’s accommodation in San Jose prior to joining the liveaboard next day, which we can assist with booking for you.

From San Jose, you will be collected by the Okeanos Aggressor I crew (pick-up from The Holiday Inn Escazu or Holiday Inn Express Forum). The transfer will take approximately 1.5 hours to meet the Okeanos Aggressor I. At the end of the charter, transportation will be provided back to these hotels or the San Jose airport. 

Guide price: 10 nights – Quad Cabin from GBP £4080 pp* / Twin Cabin from GBP £4160 pp* / Deluxe Cabin from GBP £4399 pp*
Includes: 10 nights accommodation, breakfast (cooked to order), buffet lunch and evening meal, fresh mid morning and mid-afternoon snacks, beverages (alcoholic and non-alcoholic), filled tanks, weights and weight belts. 

Package excludes: international flights, overnight hotel stays, Nitrox: USD 150 (per trip), Mandatory Emergency Evacuation Programme: 30 USD (per trip), Cocos Island Park Fee (Divers): 490 USD (per trip), crew gratuities.

*Price shown is for guide purposes only and is based on low season travel and for twin share accommodation. Please contact us for a confirmed cost based on your preferred duration and time of travel.

Quick Guide: Okeanos Aggressor I

  • 33m length
  • Max 22 passengers
  • 10 cabins – 7 deluxe, 2 twin and 1 quad cabin 
  • Recommended diver level: Advanced Open Water 

Accommodation & Facilities

The Okeanos Aggressor I has 10 cabins split into 3 different categories. All cabins have en-suite bathrooms, air conditioning, TV with media player, porthole windows, hairdryers and wardrobe.  

There are 3 deluxe cabins located on the upper deck and 4 on the lower deck, these have a double bed and a single top bunk bed.  The 2 twin cabins are located on the lower deck and have twin bunk beds and are slightly smaller than the deluxe cabins. The quad cabin has two double beds, each with a single top bunk bed and is located in the bow of the lower deck.

There is a large air-conditioned lounge located on the main deck with TV, video player, music system, movie library, books, magazines and photo & video editing facilities. There is also a large sundeck with sun loungers, as well as a shaded area with bar, grill and comfortable seating. 

Meals are served in the sociable dining area located on the main deck and are a delicious variety of American and local cuisines. Breakfasts include  fresh fruits, cooked breakfast, cereals and juices. Lunches are buffet-style, featuring hot soups, homemade breads, salads and sandwiches. Evening meals are freshly prepared by the onboard chef and include salads, vegetables, seafood, beef or chicken with homemade desserts. Fruit juices, soft drinks, iced water, iced tea, coffee, and a limited selection of local beer and wine are all are complimentary during your stay on board. 

The large dive deck is located at the rear of the main deck and has ample space for each diver with personal lockers, fresh water rinse tanks and camera table with charging points.  The diving is from two 22ft zodiacs, each capable of carrying 11 divers plus crew. There is plenty of space for each diver, making entry and exit very simple. Once the dive is completed, a staff member will assist with taking your equipment on board before you exit the water. The crew are highly knowledgeable and will ensure that you get in the water in just the right place!

Please note: as of April 2018 the Cocos Island National Park Department does not allow night dives, snorkeling and kayaking at the island for safety reasons.


10 night itinerary

Day 1
Meet in front of host hotel (See last page for pick up time). Transfer to Puntarenas for boarding and departure for Cocos Island.

Day 2 – 3
Arrive to Cocos Island, diving begins. 

Day 4 – 9
Diving! Sites will include;

Alcyone: 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.

Manuelita: The northeast corner has a sheer wall. Lots of White Tips, Marble Rays and schools of Creoles.

Special 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.

Day 9 -10
Travel back to Puntarenas.

Day 11
Check out at 7 am and transfer to San Jose Airport or host hotels

Ready for your next adventure?

Great Escapes Diving Holidays Ltd

Combs Tannery
Tannery Road
IP14 2EN
United Kingdom

Office hours: Mondays to Fridays, 9am - 5pm
Tel: 01449 535010

All the flights and flight-inclusive holidays on this website are financially protected by the ATOL scheme. When you pay you will be supplied with an ATOL Certificate. Please ask for it and check to ensure that everything you booked (flights, hotels and other services) is listed on it. Please see our booking conditions for further information or for more information about financial protection and the ATOL Certificate go to: