Changes on 05-20-15:

• Fixed a bug with oxygen tanks that would cause the switching process to never be completed.
• You will no longer begin drowning while in the process of switching oxygen tanks. You also will take a breath from a tank in use before disconnecting the regulator if it has oxygen, which will deplete the tank's supply up to 30 seconds. Oxygen tanks that have been disconnected due to being switched will subsequently no longer lose oxygen, since you aren't breathing from them. Finally, you can no longer wear a second oxygen tank or cylinder if the tank you are wearing has no remaining oxygen.
• Stopping a ship while the self-destruct sequence is active is no longer possible. Typing STOP will now abort the sequence instead.