1. Tunnel -- During an explosive decompression a high velocity wind
passes through the tunnel sufficiently strong to blow a man out the
exits, and cause serious injury. The newer ships will have tunnel
doors with small port hole openings; this will eliminate this
danger. In ships not equipped in this fashion, NOBODY SHOULD ENTER
THE TUNNEL WHEN THE SHIP IS PRESSURIZED.
2. Blister -- ALWAYS FASTEN YOUR SAFTY BELT at the blister when the
ship is pressurized. Otherwise you may be blown out of the ship
by an explosive decompression. Also be certain that your mask is
secured to your helmet, or it will be blown from the ship.