"Hawker Sea Hurricane Mk I of the Merchant Ship Fighter Unit being lowered onto the training catapult at Speke, Liverpool, for a training launch, March 1942." Hawker Sea Hurricane Mark I, Z4936 'KE-M', of the Merchant Ship Fighter Unit is lowered onto the training catapult at Speke, Liverpool, for a training launch. At the back of the catapult are some of the firing rockets used to power the launch cradle.