HMAS Melbourne (R21) was a Majestic-class light aircraft carrier operated by the Royal Australian Navy (RAN) from 1955 until 1982, and was the third and final conventional aircraft carrier to serve in the RAN. Melbourne was the only Commonwealth naval vessel to sink two friendly warships in peacetime collisions.

The 1942 Design Light Fleet Carrier, commonly referred to as the British Light Fleet Carrier, was a light aircraft carrier design created by the Royal Navy during the Second World War, and used by eight naval forces between 1944 and 2001. They were designed and constructed by civilian shipyards to serve as an intermediate step between the expensive, full-size fleet aircraft carriers and the less expensive but limited-capability escort carriers.