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The section Order of Battle of the Riverine Flotilla of the Polish Navy#Base says:-

K 7 frogmen support vessel

Erh??? There were no frogmen before WWII, except in Italy, and those were a secret. Anthony Appleyard 07:40, 20 January 2006 (UTC) reply

Not really, the Polish Navy used scuba divers extensively. They were technicians and were to be able to repair the vessels in combat conditions, rather than to sink enemy vessels. However, all types are mentioned in the article on Frogman, so I don't see where's the fire. // Halibu tt 11:15, 25 August 2006 (UTC) reply