Isla Tortuga Diving Club s.a, (Next to hotel Lys), ☎ 506/88 23 08 31 | + 506/26 42 05 44. 10 am to 6 pm. [4] Diving in Montezuma with Isla Tortuga Diving Club. Great team of friendly Italians will take you out to Tambor Bay and Tortuga Islands. For a two tank dive expect to pay 90$ per person, for a single tank 50$. They will arrange for you to be picked up at your hotel and driven to Tambor where the diving boat is. 50$ for 1 tank 90$ for two.