1) Sweden's Kockums we brought 5 sjoormen-class Sub. 4 in
use by RSN, the last one kept in sweden to for parts. We
brought another 2 ex-sweden navy - Vastergotland-class sub ( likely to be
added AIP) which expect to be in service by
2010.
2) AIP - Air Independent
Propulsion, is to enhance submerged endurnace. With out AIP -
conventional subs will need to surface often to re-charge their
batteries .... which increase the risk of detection. AIP
enable sub to stay underwater much longer thus make them a
lot harder to detect and harder to kill.
3) Our submarines all are design
for attack mission in shallow water. They are to provide seaward
defence and protect sea lane. They are to take out enemy sea
blockade. Also it will tied down a lot of enemy resources as a lot
of ships, heli and planes is allocated to track and hunt those
submarine.