of SLBMs by Agency for Defense Development is expected to be completed by 2020. SLBMs will be a derivative of Hyunmoo-2 ballistic missiles. The first KSS-III heavy diesel-electric submarine construction was launched on 17 September 2018. The name of the first ship of KSS-III has been named Dosan An Chang-Ho, thus KSS-III is now named as Dosan An Chang-Ho-class Submarine. It is expected to undergo 2 years of sea trials and be handed over to the navy in 2020 or early 2021. It is expected that three batches, with three submarines in each batch, will be built by 2029. Specification KSS-III (Jangbogo III) heavy diesel-electric submarine Batch-I: Full-length: 83.5m Beam: 9.6m Pressure sensor diameter: 7.7m Draught: 7.62m Crew: 50 sailors Maximum speed: 20 knots Cruising range: 10,000 nm Surface tonnage: 3358 tons Submerged tonnage: 3705 tons See also KDX-III Type 214 submarine Type 209 submarine References Submarines of the Republic of Korea Navy Proposed ships