Well.. Actually the name "Perisher" is a short form of the name
for the course.
It's actually called the "Periscope Course". Guess that comes from
the fact that the trainee will be "hugging" the periscope most of
the time on the course..
Interestingly, the RN has a history of sending their Perisher
graduates back to submarines as First Lieutenants (or also known as
XO). There are after all more Perishers than submarines avaliable.
This means that there are often two command qualified men
onboard.
And also, the RN likes to send submarine COs to command ASW
frigates after their tour as submarine COs. It takes a real
submariner to catch a submarine.
