Submarine Sabotage

Introduction You are currently serving aboard the USS Ibis, the first of the US Navys top-secret Puny class submarines. The Puny class is an attack submarine that packs maximum firepower into a minimum-sized hull. It relies on speed and stealth to surprise the enemy. The USS Ibis is currently on a training exercise in the North Atlantic, just off the coast of Alaska. You were doing some routine maintenance at the aft end of the submarine when the sirens sounded. You thought this might have been a training exercise until you noticed a whitish-coloured gas approaching you from the aft bulkhead. ...