Navy - Naval Operations - Depth Bombs - Depth bombs on American patrol boats, 1917 – 1918

Scope and content: original caption: depth bombs on american patrol boats. A scene on board the harvard formerly an american yacht which has been converted into a patrol boat. In the stern of the boat can be seen the depth bombs, ready to be released. These bombs have proven effective against the u-boat. Date: 1917 – 1918. Collection: National Archives and Records Administration.