A CMAS 3-Star Diver (Dive Leader) or a PADI Divemaster (DM) is a recreational diving role which includes organising and leading recreational dives, particularly in a professional capacity, and is a qualification used throughout most of the world in recreational scuba diving for a diver who has supervisory responsibility for a group of divers and as a dive guide.
 
Additional cost:
National park fee 200thb / day
Diving insurance 70thb