Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. HMS Porcupine was a 24-gun Porcupine-class sixth-rate post ship of the Royal Navy built in 1777 and broken up in 1805. During her career she saw service in the American War of Independence and the French Revolutionary Wars. The Porcupine cost L5,443.0.11d to build, plus L4,604.13.8d for fitting and coppering. She was commissioned under her first captain, William Finch, in December 1777.