The Porpoise-class were an eight boat class of diesel-electric powered, originally designated patrol, then attack submarines, and were the first submarines to be built after the end of WWII.
They were the first submarines to be built after the end of WWII. The Porpoise-class were an eight-boat class of diesel-electric powered submarines.
The Porpoise-class were an eight-boat class of diesel-electric powered submarines. They were the first submarines to be built after the end of WWII.
The Porpoise-class were an eight-boat class of diesel-electric powered submarines. They were the first submarines to be built after the end of WWII.