The Okeanos Aggressor, a former ocean-going private yacht, was built by Codecessa Ship Yard in Viareggio, Italy. The 110-foot all-steel vessel was rebuilt in 1984 by a ship yard in Jacksonville, Florida. Two years later, she became the first Aggressor Fleet franchise. In 1996, the Okeanos Aggressor underwent an extensive remodeling and renovation, and now this luxurious vessel provides 21 guests the ultimate comfort and space for cruising and diving. The Okeanos Aggressor departs weekly from the port town of Puntarenas, Costa Rica destined for dive sites along the "Isle of Coco." She can also accommodate any special requests or itineraries when the entire vessel is chartered for private groups. The Okeanos Aggressor was built to Lloyds standards and is approved by the Costa Rican Marine Surveyor Department as a Passenger Ship.

Nine well-appointed staterooms have both double and single berths to accommodate individuals or couples. One additional stateroom has three single berths. All cabins are fully carpeted, air-conditioned, and have a private bath with in-room vanity. Seven cabins are located on the lower level and three are on the upper level. A port window offers great views and plenty of natural light. Your cabin is just steps away from the main salon, dining room and dive deck.

The salon, located on the main level, is an attractively furnished area designed for comfort and relaxation. It features a complete entertainment center with TV, VCR, stereo with compact disc player, and a well stocked library of books and magazines. The dining area is separate from the main salon and has two large tables with chairs and a buffet counter. A built-in slide screen with 35mm projector is available for slide presentations.

Exiting the salon and traveling toward the stern of the Okeanos Aggressor, guests enter the large dive deck. Each guest has his/her own dive station with locker for gear storage. The lockers are actually seats used for donning and removing gear. Air and nitrox tanks are conveniently located on the back of locker, always hooked up and ready for diving. Dive masters will fill your tanks in the dive tenders and prepare your equipment for the next dive while you relax. A large, three-tier camera table, with low pressure air nozzles, charging stations, camera rinse tank and wet suit racks are located on this spacious deck. There is a dive briefing area for drawing dive site illustrations and giving site details, along with a head and two freshwater showers located on this deck. A large dive platform is located only inches from the water level and just a few steps from the dive deck. Most diving is done from the dive tenders, however, the platform is great for snorkeling between dives. An E-6 film processing lab is on board along with a full line of underwater camera rental equipment. Film, batteries, and an underwater video system are available on board. The photo pro is eager to give tips or a comprehensive course with specialty certification.

A wet bar is located on the upper level. This open air lounge is a great place for swapping stories about the day's diving and sightseeing. If you would like to catch some sun, this spacious vessel offers guests two sun areas. One is on the upper level near the wheel station and the other is on the top level. The view from the top level is astonishing.