No SOC. No need BMT.
And......as nvl cbt sys spec, you can't choose your vocation.

Less known facts about this job? Let's just say being a spec is
hardly as glamorous as it sounds. You would be better known as a
seaman. 
No SISPEC. But there's a Petty Officer Course, which is its
equivalent.
My advice to you, don't sign-on, you're a bit too old and I'm not
kidding. At 26 most would be 1st sgts or even staff sgts and a
couple of years more, no more all those streneous work. You? At 26
go and do all those things? Must 30+ then can start to relax, not
worth it lah...
Just my opinion. AND lastly, don't, never be swayed by those ads.
Find out carefully before taking the plunge. Life on a ship is
hardly like that of a cruise ship. And watching action movies is
completely different from being part of the action movie. And more
importantly, an action movie lasts only 3hrs max, your movie lasts
days at least, and weeks in an excercise.
It is precisely these things that are causing most regulars to
regret their decision.