These were formerly United States Bogue class escorts aircraft carriers and transferred to Great Britain under Lend Lease.
There were two elevators each 42' x 34' and could lift 14,000 lbs.
The island is on the starboard side.
The catapult could launch 7,000 lb at 60.8 knots. The HMS Pursuer could launch 10,000 lbs.
The Attacker class had a full sized hangar deck and was 18' high.