Try searching for Ottomar Gern battle submarine.
Meanwhile, something to wet your whistle:
Submarines OB Gurney | Encyclopedia of safety
News article from 2013:
replica-of-first-estonian-built-submarine-to-be-launched
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~Doug~
AC010505 EAMUS CATULI! Audere est Facere THFC 19**-20** R.I.P. it up, Tear it up, Have a Ball
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