SD Model Makers > German U-Boat Models > Type U 31 Class U-boat Models
H I Sutton - Covert Shores
dpa) - The new class 212 A submarine 'U 31' leaves the Baltic Sea naval base in Eckernfoerde, Germany, Monday 7 February 2005. The most modern non-nuclear submarine in the world powered
Type U 31 attack submarines (1914)
Lost WW1 German U-boat wreck found off Norfolk coast - BBC News
U-31 完全版(上)』(吉原 基貴,綱本 将也)|講談社BOOK倶楽部
Wachoffizier-Prüfung auf "U31" - Bundeswehr - YouTube