The Diver's Boat also has an office on Koh Phangan in Chaloklum. They can organize almost all their diving courses or sea trips from Koh Phangan.
They also offer first dives or trips with several dives for certified divers from Koh Phangan.Contact them to define exactly what you want to do with them.
The program and its price given here are an indication. There might be some modifications in the final programme depending on the season or other factors. You are invited to review the details of the program or itinerary wih the agency or local guide.