Amanresorts, which operates a custom-built, 105-foot coastal cruiser in Indonesia, is offering five- and seven-night adventures in the Raja Ampat marine area from Nov. 15 through Feb. 27. The vessel, named Amanikan, has three luxury cabins with king-size beds and en-suite bathrooms. It includes a crew of 10, including a dive instructor and a private chef.

Large teak decks feature loungers and dining furniture. Amanikan offers a menu of Asian and Western dishes tailored to guests’ preferences. Because Amanikan is offered exclusively, preferred routes and dive sites can be discussed with the crew before departure.

The Raja Ampat Expedition will embark from Sorong (accessible by air from Bali, Singapore, Jakarta or Makassar) on 14 trips during the 2012-13 season. Rates range from $33,500 for one couple on the five-night expedition to $50,600 for three couples on the seven-night journey. Rates include all food and non-alcoholic beverages while aboard Amanikan, as well as all dives, airport transfers, trekking, beach excursions, speedboat tours, kayaking and national park entrance fees.

Renowned for its biodiversity, Raja Ampat encompasses nearly 25,000 square miles in the northeast seas of the Indonesian Archipelago, where scuba divers can see more than 1,300 species of fish, 603 species of hard coral, 57 species of mantis shrimp and 15 mammal species. Above water, these tropical islands are home to karst forests of rare orchids, sea eagles, tree kangaroos and the famed birds of paradise. Gam Island is usually the first to be visited, the setting for two exceptional dive sites, while Yangello Island offers unspoiled beaches and mangroves through which guests can kayak, as well as the dive site known as Mayhem and the coral wall of Citrus Ridge. Seven-night itineraries also include stops in Aljui Bay where guests can visit the pearl farm and see the newly discovered “walking shark” on a night dive.

From April through Oct. 31, the Amanikan will continue to operate seven-night Komodo expedition, starting or ending with a two-night stay at the luxury tented hideaway of Amanwana on Moyo Island, and including five nights aboard the cruiser to explore the world’s only two islands still inhabited by Komodo dragons.