Lieutenant Commander Richard Prendergast Raikes was an officer in the Royal Navy notable for being the commanding officer of the submarine HMS Tuna that launched the canoes during Operation Frankton in 1942. His part in the operation was portrayed in the 1955 war film The Cockleshell Heroes where he was played by Christopher Lee.

HMS Tuna (N94) was a T-class submarine of the Royal Navy. She was laid down by Scotts, Greenock and launched on 10 May 1940. She was equipped with German-built MAN Diesel engines and spent her career in World War II in western European waters, in the North Sea and off the west coast of France, and most famously taking part in Operation Frankton.