Shipwreck on the High Seas (Soldier Dogs, Bk. 7)

Julio and his dog, Jack, help the US Merchant Marines transport supplies to troops all over the globe. But the ocean is a minefield - literally. And there are enemy submarines everywhere. When their convoy is attacked by German U-boats, Julio and Jack will have to do everything they can to help save the crew - and to stay alive when their lifeboat is stranded in the South Atlantic.