In an era of mega cruise ships that carry thousands of passengers, Callisto is a delightful alternative. More like a private yacht than a cruise ship, Callisto accommodates a maximum of just 34 guests in 17 cabins that face outside. Unlike the formalities found on larger cruise ships, a relaxed and informal atmosphere prevails aboard. A well-trained English-speaking crew of 18 manages the ship and provides friendly and efficient service. The dining room, surrounded by large windows, accommodates all guests at one unassigned seating, while the adjoining lounge, which is also lined with windows, is a good place to meet and socialize with fellow travelers, and attend lectures. When the weather permits, several meals will be served al fresco. A library faces the spacious Sun Deck.

The 17 cabins range in size from 130 sq. ft to 145 sq. ft. There are four different categories of cabins arranged on two decks, all of which feature either windows (Categories A & B), or portholes (Categories C & D); twin, double or queen-size beds; individually controlled air-conditioning; flat-screen TV; mini fridge; wardrobe; safety deposit box; and telephone (internal use). Each cabin has a private bathroom with shower, marble sink countertop, hairdryer, and fine toiletries. Callisto is equipped with stabilizers that provide smoother sailing.

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