North Andaman 5 days / 4 nights (Manta Queen 1)

Night departure from Khao Lak; about six dives in the Similans, then Koh Bon West Ridge and Tachai Pinnacle, a full day at Richelieu Rock, and a last morning at Koh Bon Pinnacle, Koh Bon and the Boonsung wreck. Similan sites are not named in advance.