Manta Queen Fleet (Khao Lak Scuba Adventures)

Khao Lak Scuba Adventures, founded in 2003, runs the Manta Queen fleet of liveaboards on 4- to 6-day North Andaman trips covering the Similans, Koh Bon, Koh Tachai, Richelieu Rock and often the Boonsung wreck. Nitrox packages and dive courses are offered on board; national park fees are charged separately per trip.