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Cocos Island Aggressor

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Dec-May

Cocos Islands

UD Rating – 3 Star

Cocos Island Aggressor

Spacious yacht designed for diving around the Cocos Island.

Cocos Island Aggressor is a real treat for those of you with the constitution to take on such a trip. Cocos is most suitable for experienced divers. But well worth it for the schools of pelagics.

  • Max 22 guests/3-4 dives per day
  • Hammerheads/White tips
  • Dive Cocos Island
  • Possible strong current
  • Advanced level divers
  • Great quality and value

The Cocos Island Aggressor is a new 124’ yacht, built and powered for comfort, safety and stability, is diesel powered, cruises at 10 knots and has 110-volt power on board. Comfortable accommodations for 22 guests includes 4 master staterooms located on the upper deck and and 7 deluxe staterooms with side by side twin beds located on the lower deck. Each stateroom features a private bathroom and shower, individual climate control, and a monitor with a media player.

The Cocos Island Aggressor has a spacious salon, large sun deck, chaise lounges, deck chairs, and stocked beverage cooler. There is ample storage space for your diving equipment in your personal locker. The yacht provide 80 cubic ft. tanks, weight belts and weights. All tanks have K-valves (American type) and DIN (European) valves.

There is a variety of nightly entertainment, including diving, fish identification presentations, movies, games and more. If you have a favorite movie or digital presentation to share, we encourage you to bring it along. The staff especially loves new releases of movies, recent magazines and books. A small library of books for exchange is maintained onboard as well as fish identification books for reference.

Deluxe Stateroom

A comfortable stateroom with a port hole, two twin bunk beds stateroom 3 - 6, a double bed and single bed (top-bunk) stateroom 7 - 11 with a private head and shower. Your stateroom is the perfect place to read a book, nap in between dives and fully recharge for the next day.

  • Two twin bunk beds or a double bed and single bed (top-bunk)
  • Services from morning beverage service to nightly turndown service
  • Private head and shower
  • Port window
  • Hair dryer.

Quad

A comfortable stateroom with a port hole, two double beds (lower) and two single twin beds (upper) bunk-style with a private head and shower. Your stateroom is the perfect place to read a book, nap in between dives and fully recharge for the next day.

  • Two double beds (lower) and two single twin beds (upper)
  • Amenities from bathrobes to individual climate control
  • Services from morning beverage service to nightly turndown service

Twin Cabin

With two single beds (bunk-style) the twin stateroom has a port hole, private head and shower, individual climate control, and monitor with media player. The twin stateroom is very similar to the deluxe, however, is smaller.

  • Amenities from bathrobes to individual climate control
  • Services from morning beverage service to nightly turndown service
  • Two twin bunk beds or a double bed and single bed (top bunk)

Route Options

Cocos Islands are not to missed the rocky pinnacles are beacons for big animals and big action. Schooling hammerheads, countless white-tip sharks, mantas, tuna and even whale sharks.

The Okeanos Aggressor I offers 10 night and a few 8 night itineraries around Cocos Island departing from Puntarenas where the 300 mile journey begins. The journey takes approximately 30 to 36 hours to get to the island. Throughout the trip, dives will be done from large dive tenders with most of the sites having mild currents attracting plenty of large marine life.

The main attractions in Cocos are the hammerhead sharks, rays, mantas, turtles and large schools of fish with the occasional sighting of whale sharks, marlin and bottle-nose dolphins. The ocean floor is a volcanic rock and most of the action takes place 15 to 30 meters down where the visibility is between 24 to 30 meters.

Special Sightings - Whale Sharks, mating Eagle Rays, Sail Fish, mating White Tip Sharks, False Killer Whales.

Cocos Island is a dive location where divers will expect to see large pelagic fish like huge schools of hammerhead sharks. Most of the dives done are close to surrounding rocks and islands as this is where the best sightings will be found.

The Okeanos Aggressor II offers 10 night itineraries with the occasional 8 night itinerary around the Cocos Islands. Divers should be comfortable diving in stronger currents and open water conditions with thermodines before going on the Wind Dancer. There are up to 5 dives per day and diving is conducted from large dive tenders. Cocos Island is essentially a huge mountain starting thousands of meters below the surface and sticking out as an impressive island with steep cliffs and little island groups. The extremely wet climate and oceanic character gives Cocos a character that is not shared with either the Galapagos or any of the other islands in this part of the world.

Okeanos Aggressor
Deluxe Cabin
Dive Deck
Quad Cabin
Salon
Dining Area
Sundeck
Dive Tender
Island

Gallery

Vessel Details

Year Built / Refurbished 1972 and refurbished in 2007
Guest Numbers 22
Length 33.5 meters l
Speed 10 knots
Engines 2 x Deutz diesel 300 hp engines
Generators 1 x Cat 55kw and 1 x 100kw 208-110 volts generators
Number of Cabins 10 large cabins (9 deluxe and 1 quad)
Communication & Navigation Systems 72-mile radar with alarm system/ 16-mile radar with alarm system/ 2 compass/ depth sounder with alarm/ weather facsimile/ 2 GPS - global positioning system/ autopilot with electronic compass/ 2 VHF Radios/ 2 SSB radio - single side band radio/ iridium sat
Salon & Dining Area Large air conditioned salon accommodating all 22 guests comfortably
Entertainment Entertainment center featuring a TV, DVD/CD, home theatre system, games and an assortment of movies
Air Compressors 2 x mako K14 and K15 air compressors with cascade storage
Equipment Rental Scuba diving equipment rental available onboard - please see price list below
Emergency Equipment First AID Kit and D.A.N oxygen system
Dive Deck Spacious dive deck with rinse tanks and storage lockers
Full Set USD75
Regulator USD60
Dive Computer USD60
Mask, Fins & Snorkel USD50
Wetsuits USD50
Torch USD8
BCD, regulator & computer USD150
Equipment Rental All equipment rental prices are for 7 night charters except the dive light which is per night.

Available Experiences

Arenal Volcano Hike

View Detail

Penas Blancas River

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Monteverde Cloud Forest Reserve

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Zip Line Canopy Tour

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ITINERARIES AVAILABLE IN THIS DESTINATION

Marcelina

Saturday, 28 April 2012

Mr Moss and Club on-board the Okeanos Aggressor

Mr Moss and Club went on a liveabord on Costa Rica.

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Mr Moss and Club on-board the Okeanos Aggressor

What Our Customers Have To Say

Reviews from our Clients, Journalists, Photo Pro's and our own Experts

Our reviews and blogs are an additional guide to evaluate of the holiday is exactley what you are looking for or not. Some love an Eco-Resort, some love air-con and a flat screen TV, we aim to ensure you get what you are looking for, at great value for money.

10 days on board the Okeanos Aggressor

If you’re looking for a tour operator who is efficient, knowledgeable and super organised, Marcelina , Ultimate Diving is the place to go! Pre-trip, nothing was too much trouble, and the trip itself? Amazing. Every little detail was taken care of, and of course, the diving was incredible.

Amy S

Okeanos Aggressor followed by Arenal Volcano & Monteverde Cloud Forest Tour

Please find enclosed a small token of our appreciation for the organisation of the trip to Cocos Island. The whole trip went without a hitch. Every bus appeared on time, every hotel was expecting us, clean and comfortable and all the guides were knowledgeable and friendly. Without exception though, was Okeanos Aggressor. The boat, crew, food and accommodation were first class and to be recommended to everyone and anyone. The diving lived to up expectations (although the crew reckoned it was only average, so another trip could be on the cards). The weather was also exceptional as we had calm conditions all time and very little rain. I could go on and on but just want to thank you once more for an exceptionally well organised trip and would (will) certainly recommend Ultimate Diving to all.

Mr Moss and Club

7 nights on-board the Okeanos Aggressor

We had a really good time, the crew on the boat were fantastic, the food was amazing and the diving was superb, a lucky combination of all on a liveaboard. On our check dive we had mantas, schools of hammerheads and dolphins. Other sightings included tiger and Galapagos sharks, a phenomenal experience! After the first dive and seeing so many sharks, we thought it was quite nice and almost took them for granted. The diving here was spectacular. The boat was not glamorous but very clean and comfortable. The cabins were of reasonable size with a double and a single bunk allowing for extra storage space. Towels were changed every couple of days and after dives you get a guide waiting for you with a nice hot towel and great snacks.

Mr & Mrs Underwood

Bajo Alcyone

Cocos Island, Costa Rica

Bajo Alcyone is the place to see the Hammerheads amongst other pelagic. The abundancy of resident sea life makes this site one of the island’s signature dives. Mantas, Whitetip Sharks, Whale Sharks, Silky, Blacktip Sharks, and hundreds of schooling Hammerheads are everywhere. And underwater plateau, discovered by Cousteau when he visited Cocos Island, is home to a variety of sharks.

  • Min Dives: 4
  • Dive Type: Boat Dive
  • Diver Level: Open Water Diver
  • Max Depth: 25m

Dirty Rock

Cocos Island, Costa Rica

Located near Wafer Bay, Dirty Rock is an impressive and exciting dive. Noted as one of our guests’ favourites, here you will come up close and personal with Whale Sharks that often cruise around this site.

Dirty Rock is perhaps best known for the hundreds of Marble Rays and huge schools of Jacks that can be seen here. A swim through one of the schools is definitely worth the trip!

  • Min Dives: 9
  • Dive Type: Boat Dive
  • Diver Level: Advanced Open Water Diver
  • Max Depth: 39m

Big Dos Amigos

Cocos Island, Costa Rica

Dos Amigos Grande is better known for its huge arch, a swim through so big that an entire diving group can move through it at the same time, Marble Rays swimming among divers, Eagle Rays feeding or mating, and schooling Hammerheads are typical scenarios at this memorable dive site.

  • Min Dives: 4
  • Dive Type: Boat Dive
  • Diver Level: Open Water Diver
  • Max Depth: 18m

Lone Stone

Cocos Island, Costa Rica

There are some nice shark photo opportunities throughout the dive, and a very cooperative marbled stingray. Slowly swimming through the huge rocks, guests will noticed a vertical crack in the reef, about 25-30 high and perhaps five feet wide. With shimmering sunlight streaming down from fissures in the top, you could see the fish, hiding from the current, and the ever-present predators. There are silver Snappers, Yellow Grunt, Red Cardinal Fish, and big Trumpet fish in one vertical school.

  • Min Dives: 9
  • Dive Type: Boat Dive
  • Diver Level: Advanced Open Water Diver
  • Max Depth: 30m

Submerged Rock

Cocos Island, Costa Rica

Underwater, this rock plunges down both sharply and gradually. It is broken up with large ledges, some with sandy bottoms, and an outer pinnacle. The colourful, prolific fish life gives relief to the harsh contours of the reef. Sometimes the fish gather in such numbers that they momentarily blot out the sun.

  • Min Dives: 4
  • Dive Type: Boat Dive
  • Diver Level: Open Water Diver
  • Max Depth: 18m

Lobster Rock

Cocos Island, Costa Rica

On this finger-like rock, divers can easily approach large white tips lying on the bottom in great numbers. In the deep sandy area surrounding it, the elusive rosy-lipped batfish can be found between 90 and 120 feet.

Marine Life: White tips, marble rays, manta rays, eagle rays, red lip batfish, frogfish, garden eels

  • Min Dives: 9
  • Dive Type: Boat Dive
  • Diver Level: Advanced Open Water Diver
  • Max Depth: 33m

Manuelita

Cocos Island, Costa Rica

Manuelita dive site has a boulder formation where you will find hammerhead sharks along with other marine life including lots of White Tips, Marble Rays and schools of Creoles. A great day and night dive. Known as the dive site that never sleeps!

  • Min Dives: 10
  • Dive Type: Deep Dive
  • Diver Level: Open Water Diver
  • Max Depth: 30

Ubing Rock, Wafer Bay

Cocos Island, Costa Rica

Located at Wafer Bay, the southeast slope of Ubing Rock attracts schooling Hammerheads. This rock drops to a sandy bottom. The rock begins at 20m and falls all the way to 110m.

  • Min Dives: 10
  • Dive Type: Boat Dive
  • Diver Level: Open Water Diver
  • Max Depth: 30m

Bird Island, Chatham Bay

Cocos Island, Costa Rica

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.

  • Min Dives: 10
  • Dive Type: Boat Dive
  • Diver Level: Open Water Diver
  • Max Depth: 30M

Manta Corner

Cocos Island, Costa Rica

South of Cocos Island. The reef is about 27 metres deep if you want to full presence of manta rays! The reef is believed to be part of the submerged mountain range. It can be a boat, drift or deep dive.

  • Min Dives: 10
  • Dive Type: Boat Dive
  • Diver Level: Open Water Diver
  • Max Depth: 33m

Little Dos Amigos

Cocos Island, Costa Rica

Known for being a hammerhead cleaning station. Located south-east of Cocos Island, below Big Dos Amigos dive site. The visibility is 20m. This dive site often suprises divers as the open sea current first reaches the island at this point bringing in a wide variety of marine life.

  • Min Dives: 10
  • Dive Type: Boat Dive
  • Diver Level: Open Water Diver
  • Max Depth: 30m

Cabo Atevida

Cocos Island, Costa Rica

Remote from other dive sites on the east side of the island but also attracted by hammerheads like most Cocos dive sites. The marine life has high density and has a wide variety living or passing here.

  • Min Dives: 10
  • Dive Type: Boat Dive
  • Diver Level: Open Water Diver
  • Max Depth: 30m
Dates Duration Route Room Type Price
12 Sep 2026
22 Sep 2026
 10 Nights Cocos Island Adventure Twin Cabin £0
12 Sep 2026
22 Sep 2026
 10 Nights Cocos Island Adventure Twin Cabin £0