South Korea has launched the 7th KSS-2 submarine with an air dependent propulsion technology. It would bolster the countries' ability for extended underwater operations. It is 1,800 tonnes and its overall length is 65m and can remain submerged up to 2 weeks at a time. It can carry a crew of up to 40 to a depth of 400m. The submarine is capable of launching naval mines and each is armed with 85mm tubes that can deploy antisubmarine and antisurface warfare heavy torpedos.