1. While the Koreans have significantly evolved the design of the KSS-I Chang Bogo class to meet their own needs, the older designs only have a 2 MW propulsion motor; which in the past served as a limit the ability of the submarine to conduct sprints. There newer sub-systems that allow up to 4 MW.The Chang Bogo class are a variant of the Type 209 Sub, which has now been in production on and off since the very early 1970s, has to be some kind of record for a Warship design. Of course internally they would be a very different but the Baseline design is the same
2. The nine 1,860-ton KSS-II Son Won-il class submarine are each powered by a 4 MW Siemens Permasyn propulsion motor; and this tech was also applied to at least the Type 214 submarines of TKMS.
(a) South Korea launched its final KSS-II submarine, at Ulsan Shipyards on 7 Sep 2017. The nine KSS-II and four Greek Type 214 submarines, each have a length of 65 m, a beam of 6.3 m, and a draught of 6 m. It is interesting to note that the Portuguese navy’s Type 214 are larger with slightly different dimensions (with a length of 67.9 m, a beam of 6.3 m and a draught of 6.6 m).
(b) South Korea's KSS-I, KSS-II and KSS-III building program suggest a goal of having a rolling average of 18 to 22 submarines to match Japan's medium term goal.
3. TKMS has:
(a) completed 3 batch 2 Dolphin class submarines
(b) built the first of 4 Invincible class submarines; and
(c) orders for 6 new Type-212CD submarines,
are each of which are to be powered by a propulsion motor (often with a rated power of 4 MW or more).
* The AIP equipped batch 2 Dolphins are larger than the batch 1, Type 212A German submarines. In October 2017, Israel and Germany confirmed that they have finalised a MOU for the purchase of three more Dolphin-class submarines to be delivered starting in 2027. These boats will replace the first three of the class which by then will be about 30 years old.
- Displacement: 2,050 tons surfaced, 2,400 tons submerged
- Length: 68.8m
- Beam: 6.8 m (22 ft)
- Draught: 6.2 m (20 ft)
- 3 MTU V-16 396 SE 84 diesel engines with three Siemens 750 kW alternators, and a Siemens sustained-power motor of about 3 MW output power
- Speed: 25 kts submerged
- Complement: 35 + 15 passengers
- Armament: Six 21" (533mm) torpedo tubes and four 26" (650mm) torpedo tubes.