Based at Le Méridien, just beyond the southern end of Patong, this is an excellent, professional diving operation, with high standards, impeccable service and enthusiastic, well-versed instructors (though it's a little more expensive than other dive operators). Snorkellers can join diving day trips for 2900B. PADI Open Water Diver certification costs 18,400B to 21,400B.

There's another branch in Kata.