Altitude diving definition
Altitude diving means SCUBA diving where the surface is above sea level. The specific height above sea level that will be used to determine whether a dive is an altitude dive or not is determined by the Dive Tables used to plan the dive (e.g. the US Navy Dive Tables regards any dive in excess of 91 meters above sea level as an altitude dive and the Buehlmann Dive Tables regard any dive in excess of 700 meters above sea level as an altitude dive).