Close-up photos of the Poole 3"/23 caliber deck gun on display in the Washington Navy Yard, and Poole 3"/23 caliber deck gun schematic drawing (NHC collection), submitted by Jack Hudock. Photo Set - click to view large versions Image Image Image Image Book traversal links for Deck Gun: 3"/23 Caliber Poole gun - Large Images ‹ Browning Automatic Rifle Up Deck Gun: 3"/23 Caliber Poole gun - Museum Images ›