Davy Jones' Locker (DJL Diving)

Long-running PADI 5-Star IDC centre on Koh Tao, founded in 1996 and based in Sairee since 2006. Its site lists fun dives, PADI courses up to instructor level, Enriched Air (Nitrox) and a full PADI TecRec programme (Tec 40–50, Trimix, CCR), with small groups of up to four divers per guide.