EntityQ554487· pop 12· linked from 83 articlesU-21Sign in to save1936 Type IIB submarineConnectionsType II submarineEntitygross register tonnageEntitymotor-generatorEntity2 cm Flak 30/38/FlakvierlingEntityFinlandCountryUnited KingdomCountryDenmarkConceptSwedenCountryWorld War IIConceptNorth SeaEntityNazi GermanyConceptgeographic coordinate systemEntityInternational Standard Book NumberEntityKielEntitytonneEntityKristiansandEntitytorpedoEntitydiesel engineEntityRoyal NavyEntitypropellerEntityCategories1936 shipsGerman Type II submarinesGrounded U-boatsMaritime incidents in March 1940Ships built in KielU-boats commissioned in 1936World War II submarines of Germany