Originally Posted by SASless
Wait a minute...but if non-hackers are given the heave-ho, and the rest of the officers have never been tested....how do we know they could step up and replace a lost Captain?
Because the Executive Officers, second in command, also known as Number 1(?) - just think Riker in Star Trek, have also passed the Perisher course.
Although quite how you'd manage to lose the Captain I don't know, submarines are really quite small. Now on an aircraft carrier...