Minimum of 2 Divers, maximum of 4. My insurance does not cover divers, so you must sign a liability waiver. Please download it and have it filled out prior to your arrival. Fuel is billed at current national average for regular and measured by a floscan. My Honda Engine is as economical as they get, but Trip Fuel can range from 25 to 100 gallons depending on where you want to dive.