Of the many U-boats lost within the Baltic Sea area's, is it known if the following have been left in situ or raised and broken up? U80, U236, U272, U367, U393, U416, U579, U580, U583, U649, U670, U718, U768, U904, U983, U1015, U1210, U3032 and U3523?. Also U272 were there five trainee L.I. crewmen on board when she was lost? John