Attacker Class Escort Carrier Summary

Thirty-four of the 45 ships of the Bogue class were transferred to the Royal Navy under the provisions of the Lend-Lease program. These were given new names for their RN service and returned to the US Navy after the war. Out of the first group of 22 ships, 11 were transferred to the RN and reclassified as Attacker class. These ships had been converted from Maritime Commission Type C3 cargo ships that were finished or had already been laid down. A second group of 23 ships were built from the keel up, based on C3-S-A1 or C3-S-A1 plans, and transferred to the RN and reclassified as Ruler class, or Ameer class, in British service, and sometimes as the Prince William class by the US Navy.

As delivered, these carriers required modifications to conform to Royal Naval standards. The Attacker class ships had their conversions carried out in drydocks in United Kingdom, but due to these ports being overwhelmed 19 of the 23 ships (sometimes referred to as the Ameer class) were converted at Vancouver, British Columbia, Canada. These included extending the flight deck, fitting redesigned flying controls and fighter direction layout, modifications to the hangar, accommodation and store rooms, extra safety measures, oiling at sea arrangements, gunnery and other internal communications, extra wireless and radio facilities, ship blackout arrangements and other changes necessary for British service.

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