CAM ships were World War II–era British merchant ships used in convoys as an emergency stop-gap until sufficient escort carriers became available. CAM ship is an acronym for catapult aircraft merchant ship.
The Hawker Sea Hurricane W9182 on the catapult of a CAM ship
A Hurricane IA before launch during trials at Greenock, in 1941
Test launch of a Hurricane at Greenock, Scotland, 31 May 1941
An Empire ship is a merchant ship that was given a name beginning with "Empire" in the service of the Government of the United Kingdom during and after World War II. Most were used by the Ministry of War Transport (MoWT), which owned them and contracted their operation to various shipping companies of the British Merchant Navy.
RFA Wave Victor, ex–Empire Bounty
HMS Activity, formerly Empire Activity
SS Hannover listing before her capture on 6 March 1940; later HMS Audacity