at the end of Service term in OCS, you will fill out a form that
states your preference of vocations. this is simply a preference,
and your PC will try his/her best to fulfill that request. but
ultimately, the final decision comes from higher command after an
assessment of your grades, commander's appraisal and other factors,
which i, myself, am not clear of.
just so you dont enter OCS with the mistaken impression that you
can choose your
vocation.
i'm not so sure about SISPEC. if anyone could kindly
enlighten?
choose, can.
but u will have to fix a path for yourself at the right time,
before the term ends.