Liveaboard Diving Preloader

Okeanos Aggressor I

Costa Rica

from/per day 435
  • Nitrox (extra cost)
  • Dive Platform
  • Equipment (extra cost)
  • Alcohol
  • Internet (extra cost)


Nitrox (extra cost)
Dive Platform
Dive Tender(s)
Separate Camera Rinse
Shaded Kit-up Area
Equipment (extra cost)
Non Divers Welcome
Camera Station

On board

Liveaboard facilities

Here's a small list of what we consider to be the most important features and services on board the Okeanos Aggressor I:

Aircon Dining
Entertainment System
Local Food
Satellite Phone
Snacks included
Vegetarian Catering
Warm Water Showers
Western Food
Internet (extra cost)
Selection of Wines available


  • Soft drinks
  • Drinking Water
  • Local Food
  • Western Food
  • Meals served Buffet Style
  • Snacks throughout the day
  • Vegetarian Options
  • Tea & Coffee
  • Fruit Juices



Cabin Types*

Quad Stateroom From435

This small 4m2 cabin accommodates up to four people with a double bed and two single beds, perfect for a group of diving friends or a diving family. The cabin has individually controlled aircon, a small TV with media player and a private toilet and shower.

  • Guests: 4 guests max
  • Beds: Doubles & Twins available
  • Bathroom: Ensuite
  • Air conditioning: Aircon (own control)
You can request your cabin type during the booking process.

Deck Plan

Boat Info

Max guests 22
Cabins 10
Bathrooms 12
Length 33 m
Beam (width) 8 m
Built in 1972
Renovated/Converted in 2014
Cruising speed 10 kn
Tenders 1 – Panga

Boat Description

The Okeanos Aggressor I liveaboard is a 33m yacht, built and powered for comfort, safety and stability. She is diesel-powered, cruises at 10 knots and has 110-volt power on board. Comfortable accommodations for 22 guests in 9 double cabins and a quad cabin. Each cabin features a private head and shower, and storage space for your luggage. She has a spacious salon, 13 meters of sun deck, chaise lounges, deck chairs, bar, grill, and a complete photo center. The onboard video format is both NTSC and PAL.


All staterooms are air-conditioned and fitted with private toilets, showers and sinks. Breakfast (cooked to order), buffet lunch and an elegant chef prepared meal at dinner with table side service are served in addition to fresh mid morning and mid-afternoon snacks. Beverages (alcoholic and non-alcoholic) are complimentary while onboard. The yacht is equipped with hairdryers in each stateroom. Linens are changed mid-week and fresh towels are placed in each stateroom as needed. Filled tanks, weights and weight belts are included.


Email is available through the satellite system. There is a charge for incoming and outgoing email. Private calls may be made from the liveaboard. When diving at Cocos Island, there is a cell tower with intermittent reception. There is no coverage in the Bat Islands or Caño Island.


The menu onboard both yachts is varied and plentiful, with a variety of American feasts, barbecues and local cuisine. If you have any special dietary requirements, please advise the US office as soon as possible so the liveaboard crew can adequately prepare to meet your needs. You will wake up to fresh fruits, hot entrees, cereals and juices. Lunches are buffet-style, featuring hot soups, homemade breads, salads and sandwiches and/or entrees. Dinners are chef prepared and served each evening and include salads, vegetables, seafood, beef or chicken with a fresh homemade dessert. Once arrived, please speak to the chef about any special needs. Certain special dietary and beverage requests may not be available due to the remote nature of this location.


The Aggressor’s selection includes fruit juices, soft drinks, iced water, iced tea, coffee, and a limited selection of local beer and wine, which are complimentary. Due to the high duty charged on liquor, we suggest you bring your special brand from the U.S/International. Due to local regulations; the bar will be closed while the boat is in port. Drinking and diving do not mix. Once you consume alcohol, you become a snorkeler until the next day.


The crew of this liveaboard, with their unique combination of talents offers the ultimate service. While on board you may pick a buddy of your choice or dive with a crew member. There is ample storage space for your diving equipment in your personal locker. The Okeanos Aggressor yachts provide 80 cubic ft. tanks, weight belts and weights. All tanks have K-valves (American type), no DIN (European) valves. There are a limited number of 100 cu ft/13-liter tanks available. With advanced notice, these can be rented from another operation. The cost is $90 and must be rented in advance due to availability.

Diving amenities include Nitrox (unlimited Nitrox is $150 for 10 night charters).

The panga (tender boat) is 22 feet in length. There is ample space for camera equipment and the panga driver/deck hand will handle it with care. Getting you in and out of the water from the panga is easy. Once you've surfaced and you’re preparing to get back in the panga, a crew member will assist and help take your tank. There is a divemaster on each panga for every single dive. You hand him your weight belt, and the rest is easy. All diving should be within the limits and standards of the training agency that certified you. All dives should be planned with no decompression.

NOTE: Guests will be provided free of charge a GPS locator that operates through satellite in case of an emergency, it sends an SMS to the Okeanos local office with coordinate and to the rescue coordination center with a web link to your location.

We suggest you pack the following: mask, fins, snorkel, regulator with visible pressure gauge, depth gauge, dive computer, buoyancy compensator, and gloves. Strongly recommended: Spare mask, a diving watch, underwater light, safety sausage, whistle, mirror and/or other safety devices. Dive computers are mandatory. Each piece of gear should be marked with waterproof paint or tape. Due to the thermoclines and upwelling, we recommend a 3mm wetsuit as a minimum. Most divers use a 5mm wetsuit with booties and a hood.


All divers visiting Caño Island and Guanacaste and The Bat Islands are required to have diving accident insurance and are encouraged to purchase Trip Cancellation and Interruption Insurance as well.

Included in your trip price
  • Value added tax
  • Weights, belt, tank & fills
  • All meals
  • Accommodation on board
  • Dive guide
  • Local Airport Transfers
  • Local beers and wine
What's not included in your price?
  • International / Domestic flights
  • International / Domestic airport taxes
  • Travel insurance
  • Diving equipment
  • Scuba diving insurance (PROOF REQUIRED)
  • Park Fee (10 nights) 490.00 $
  • Park Fee (8 nights) 350.00 $
  • Emergency Evacuation Plan 30.00 $
  • Onboard telecommunications
  • Airport departure Tax (on leaving the country) 29.00 $
  • IMPORTANT: Guest's travel plans MUST include a one-night stay in San Jose, prior to departure to meet the necessary transfer schedule on the day of departure
Cancellation Policy of this Operator

121 days or more prior to departure, 20% is forfeited.
120 - 91 days prior to departure, 40% is forfeited.
90 days or less prior to departure, 100% is forfeited (no refund available)