Range and repair capacity took priority over fleet-carrier speed

Unicorn's 24-knot maximum speed was sufficient for support work, although she could not keep pace with a fast fleet carrier. Her machinery emphasized cruising endurance, with a range of about 7,000 nautical miles at economical speed. Protection included a 2-inch flight deck, heavier armor around magazines, and lighter armored bulkheads. Aircraft figures vary, but roughly 33 to 36 could be carried in operational conditions, with many more transported crated. The combination favored worldwide sustainment, repair, and transport over a high-speed dash with the striking force.