In the old days, it was called OOC (out of course). OOT is just
a new term from Mindef. Old habits die hard...that's why in unit,
OOC is still common.
Training schools usually very on the ball with new directives from
Mindef. It's when you go unit, that your EYES OPEN to new
experiences.
Anyway, if you OOT from BMT, chances are you will be posted out to
non-combat vocations. But 99% of the time, you will get storeman,
driver, etc positions. Very rarely you will get to be a clerk. Why
is this so? Because Mindef wants to maximise manpower, so those OOT
will be assigned to new vocations instead of having them lobo at
their training unit (however, there's special cases).
So let's say you OOT due to knee injury. You are not sent for
medical board but maybe you got excuse for 3 months. You may get
posted to unit to be storeman. In your new unit, your MO may review
your case and decide to send you for medical board. If NO, then
jialat. Because your Pes status will remain at A/B and once your
excuse expires, CPC will know and send you back to BMTC/SISPEC/OCS
to do your course AGAIN. (but this was last time, now that NS is 2
yrs, dont think got enough time to do long course like OCS)
Same situation if you OOT and got a temp downgrade for 6 months. If
you get upgraded, you will be sent for recourse at BMTC etc.
So if you OOT from BMT, got posted to storeman to unit, after 1
year, got recourse back to BMTC, finish BMT, and your pes is still
A/B, you will be sent to COMBAT unit. You can forget about going
back to your unit as clerk/storeman if you are combat fit.