In early December, German shipbuilder Thyssen announced that Singapore’s navy had contracted two Type 218SG U-boats, a variety previously unknown. While the Type 216 concept has been in public discussion Type 218 had not. As it seems, Type 218SG is an improved version of Type 214, adjusted to Singapore’s specific needs, thus the “SG” suffix. Given its size and operational profile, Type 214/218SG subs are very well suited for operations in coastal waters, such as those around Singapore. Thyssen’s offered Type 216 concept is would have been too large.
Thanks to the air-independent propulsion (AIP) fuel cells the U-boat operates almost noiselessly like a nuclear-powered submarine, but without the heat signature caused by the reactor. In consequence, by 2020, Singapore will receive the most advanced non-nuclear-powered submarines in the Indo-Pacific.