The U-505 is a German World War II Type-IXc Unterseeboot (submarine) that was captured in battle on the high seas by boarding parties from the USS Guadalcanal task group 22.3 on 4 June 1944. This film contains some of the most amazing war footage ever taken, documenting the capture in detail. In 1989 the U-505 was designated a National Historic Landmark. Since 1954 over 23 million visitors have toured the U-505.

Many other aspects of submarine warfare are examined. Join the unsung heroes of submarine warfare who went to sea in submarines, carrying the battle to the enemy in his own waters, from Pearl Harbour to the surrender in Tokyo Bay.