Fill a Self Contained Underwater Breathing Apparatus (SCUBA) cylinder with compressed.
air at 3000 pounds per square inch (psi), and position the cylinder in its mounting plate. Place
the cylinder on the left side of the box base so that the cylinder is 1-inch from the box side,.
and the cylinder valve flush with the front edge of the base. A carbon fiber apparatus
(SCUBA) cylinder with compressed air at 4500 psi may also be used.