CAN DIVE NOW

Malaysia’s first submarine KD Tunku Abdul
Rahman (KD TAR) which was reported to have a
mechanical fault, has been completely repaired
and is expected to be go under water on Feb 22,
Defence Minister Datuk Seri Ahmad Zahid Hamidi
said.
So okay la , SYABAS minister, now our submarine can dive now
so not 'malu' anymore la. Then the defence minister said

I have personally visited and monitored the
situation at the air force base and I hope all
quarters will stop speculating on the matter until
the investigation is completed,” he said.
Alright, I ain't gonna speculate how much tax payers monies
for the repair since the minister said the submarine was still
under guaranteed. But if, okay just once speculation/ curiosity
what gonna happen if the submarine can dive and then CANNOT
come up (float), then how?