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In the prewar years the Leutnant needed one
year and six to nine months to reach this rank. At 1938 were roughly 2 years usual.
The Oberleutnant zur See wear one star on the plain shoulder-strap, the Oberleutnant (Ing.) has a cog-wheel on the shoulder-strap. They had one stripe on the shade of cap. On the sleeve they wear two stripes and the star (engineer officers also wore the cog-wheel). During WWII this was the most common rank of U-boat commanders. |
![]() Oberleutnant Erich Topp as commander of U-552. |
![]() Oberleutnant (Ing.) Erich Zürn the LI of U-48. |




