AT the outbreaqk of war the midget S-boats "LS 1" and "LS 2" had been decommissioned. From 1940 on the interest in the boats were revived. The aluminium boat developed by Dornier "LS 2" were to be finished and to be braught on board Hilfskreuzer "Komet" (HSK 7) as "Meteor". Since the planned for 45 cm torpedo tubes could not be realised the boat was fitted with the minelaying installations at the stern, so that it could be used as fast minelayer, to drop mines in habour entrances.The installed aircraft engines caused problems, so that "Meteor" could not be operated ba "Komet". In spring 1940 four more boats were ordered at Dornier. For "LS 3" and "LS 4" newly developed Daimler-Benz light Diesel engines MB 507 were available. The boats got a minelaying installation for four instead of hitherto three mines. "LS 3" was delivered on the 14.10.1940 and operated from Hilfskreuzer "Kormoran" (HSK 8). "LS 4" received two aft torpedo tubes. As first boat it got the newly developed propellers and made 42,5 knots. It was placed on board Hilfskreuzer "Michel" (HSK 9).
For boats "LS 5" and "LS 6" were only Junkers aircraft engines available. On orders of the OKM both units were fitted as submarine-chacers (depthcharge carriers) for the Aegean Sea and transported to the Mediterranean. Since the corresponding search and detection unit was moved to the Balck Sea, the boats never became operational.

For the series "LS 7" - "LS 12" the MB 507 engines again were available, so that they were built as torpedo carriers. "LS 7" was delivered on 08.10.1943, "LS 12" on 12.07.1944. "LS 7" - "LS 11" were yet transported to the Aegean Sea, "LS 12" was stopped in Jugoslavia and became testboat at the torped testing authority. It became a Soviet loot.

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