Sea Hurricanes were based on -
I, Ib, IIb, IIc, XII
From FAA website
The first of the Sea Hurricanes to see service with the Fleet Air Arm arrived in February 1941 and were operating with front line unit 880 squadron from 15 March 1941. Overseas deliveries commenced with shipping in HMS Furious to 807 squadron at Gibraltar 1 July 1941 (eg V7301, V7623), Many shipped to Simonstown in SS Lt St Lonbert Brie thence to 800 squadron HMS Indomitable in July 1942 (eg V7416), some shipped to South Africa in SS City of Bombay 9 January 1942 (eg Z4056) and others shipped in SS Belgian Seaman to Takoradi from Liverpool 30 June 1942 (eg BP709). A significant loss occurred when Sea Hurricanes were sunk with HMS Eagle which was torpedoed on 11 August 1942 (eg V6854).
The Sea Hurricane Mk I were followed by about 300 Mk Is converted to Sea Hurricane Mk IB configuration, these having catapult spools plus a V-frame arrester hook: in addition 25 Mk IIA were modified as Sea Hurricane IB or Hooked Hurricane II fighters. Their initial role was a considerable improvement on CAM-ship deployment, for from October 1941 they began to go to sea aboard MAC-ships, these being large Merchant ships fitted with a small flight deck.
Sea Hurricane Mk IC fighters, introduced in February 1942 were conventional Mk I conversions with catapult spools and arrester hook; they had, however, the four-cannon wing of the land-based Hurricane Mk IIC. The Sea Hurricane Mk IIC, was intended for Fleet carrier operations and, consequently, was without catapult spools. This version was also used as hurri-cats. They introduced also to navy service the Merlin XX engine, and carried FAA radio equipment. Mk.IIC's with 4-cannon wings built by Hawker and delivered between December 1942 and May 1943. The Sea Hurricane Mk X - Canadian built Hurricane X converted to Sea Hurricane standards were all classified either Mk.IA or Mk.IB by the RN, even though all used the two-stage Packard Merlin 28. Thet were all built with eight .303 machine guns. The Sea Hurricane Mk XII - Conversion of Canadian Hurricane XII for Royal Canadian Navy with full naval equipment. Packard Merlin 29 with twelve .303 machine guns. The last of the Sea Hurricane variants was the Sea Hurricane Mk XIIA, of which a small number were converted from Canadian-built Mk XIIs, and these were used operationally in the North Atlantic. Although the Sea Hurricane last saw service in 1945, Sea Hurricane NF670 was still extant on the East Kirby dump in 1956/57.
Versions
Mk I One Hurricane Mk I conversion; Catapult spools and arrester hooks
Mk IA 50 Hurricane conversion; catapult spools only; specially produced for
CAM fighter scheme - launched from CAM ships
Mk IB 300 Mk I (merlin III) and 25 Mk IIA series 2 conversions; Catapult
spools and arrester hook (MAC-ship service)
Mk IC Hurricane Mk I conversion with four-cannon wings; catapult spools
and arrester hook
Mk IIC Arrester hook and naval radio equipment
Mk XIIA Canadian built navalised Mk XII, with Packard Merlin XXIX engine
Lol - imagine the XII, 12x303s !!!