![]() ![]() If the sub had twice the internal air volume it would weigh about one thousand pounds more. This in turn increases the weight and cost of the handling equipment. This is not possible with a One Atmosphere design so they are inevitably heavier.Īdded weight increases the required strength of all handling equipment. The SportSub design provides a very small internal air chamber because the occupants are half submerged in water. If the internal air volume can be reduced, the weight can be reduced. The weight of a sub must always be exactly equal to its buoyancy, most of which comes from the air inside it. The weight of any dry submersible is dictated by its internal air volume. The system also makes underwater adventures more available to passengers who might otherwise feel uncomfortable in an enclosed space. This gives the operator more confidence that passengers will be capable of handling a ‘worst case’ emergency situation. ![]() Having to enter the sub by swimming into the cockpit is a nice way to help prevent passengers from taking a ride if they aren’t comfortable under water. The SportSub design eliminates this problem.Ī third safety feature of the swimming entry is that operators and occupants are more confident. If a hatch in at the top of the cockpit in a closed system were to leak, all the air would escape and buoyancy would be lost. Since the SportSub works in a balanced pressure system, the hull isn’t required to contain enormous pressure and can never be crushed by external water pressure. Occupants can readily escape from the SportSub by swimming out. The simple rear opening can never get stuck or jammed shut, trapping occupants inside. The greatest advantage of swim-entry is safety. ![]()
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