Similan Diving Safaris., Ltd
Offer a full range of PADI courses, diving day trips and liveaboard diving. All major European languages and Swedish are spoken on their boats. Also offer help with airport pickup, rooms and transport to and from Khao Lak.
http://www.similan-diving-safaris.com/

Scuba diving in Phuket & Khao LakThailand.
Liveaboard & Day trips to dive sites like Similan Islands, Raya Noi & Yai, Richelieu Rock, Shark Point & Phi Phi on our Liveaboard or Day trip boats.
http://www.sea-bees.com

Sea Dragon Dive Center
PADI organisation departing from Khao Lak. Similan islands liveaboard dive trips around Phuket and Khao Lak.
http://www.seadragondivecenter.com

Diving in Thailand
Big Blue Diving resorts are some of Thailand's leading dive resorts, offering unrivalled, first class facilities and accommodation for diving, snorkelling and other activities in Koh Tao, Koh Samui and Koh Lak., reef check, A PADI SSI Scuba Diver Training facility.
http://www.bigbluediving.com

Manta Point scuba diving in Khao Lak
Scuba diving Khao Lak with Mantapoint: Liveaboards and manta ray expeditions in Khaolak, Koh Bon Thailand, PADI dive courses, daytrips to the Similan islands in the Andaman Sea
http://www.mantapoint.com/