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.

HMS Milford was a 28-gun Coventry-class sixth-rate frigate of the Royal Navy. She was built at Milford by Richard Chitty and launched in 1759. She was sold for breaking at Woolwich on 17 May 1785.