Weight in air = 20 tons Length = 37 ft. Max. Safe sea state = 3.5 Draft in salt water = 8.5 ft. minimum Surface speed = Est. 10 knts. with external fairing Surface Speed without fairing = 3 knts.						Submerged speed = with Ext. Fairing 5 kts. Maximum diving depth = 305 m. Crew = Pilot and copilot Passengers = 4 or 5 depending on rules Underwater Telephone = Multi frequency 4 mile range Under water life support = 72 hrs.