I was a Machinist Mate, but I worked up topside and hung out
with a lot of guys in the various G divisions. Most of them DO NOT
get to work on the small stuff.
You may find yourself driving a forklift, as another poster said, or
perhaps monitoring an auxilliary salt water cooling pump for the
CIWS, or maybe even shuffling paperwork. Truthfully, it seems to
be hit or miss.
The only way you're gonna get to do what you want to do
in the Navy is be *extremely* lucky the first time around, or
be very determined and patient. If you want something bad
enough, and you work for it, you can make it happen.
That being said, there are a few guys who get to play with
the fun stuff of a daily basis. But If you think they're gonna let
a ricky Seaman be in charge of (or hell, even *touch*)the SEAL
teams armory, you are experiencing a serious reality discontinuity.
Every E4 and below GM I've ever known has spent more time
berthing cleaning, mess cranking, and field daying than they
ever had working with any kind of weapon system.
However, be patient young grasshopper. The Navy is like that.