General Information
Deep Six is an underwater scuba extension of Similan Island No.7 with a maximum depth of 35-40 meters for scuba diving. Deep Six consists of small as well as huge rocks and boulders covered with soft coral and seafans. At the biggest boulder in the center, a pile of smaller rocks form swim-throughs that rise from about 22 meters to about 12 meters.

This map is reproduced with permission from Pocket Divesite Guide Book
Similan including Koh Bon, Koh Tachai & Richelieu Rock
For details contact Dive Site Thailand
Available at Sunrise Divers
Current
Moderate, sometimes strong current, particulary at the pointed end of the reef as the current can make you drift away from the boulders. The current flows from the southwest to the northeast towards high tide and north to south towards low tide.
Marine Life
Black and White Snappers, Groupers, Travellys and Barracudas are often seen here as well as oriental Sweetlips and Harlequin Sweetlips. Kuhl's Stingrays and Turtles are here too.