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by Lt Cdr Geoffrey B Mason RN (Rtd) (c) 2005

HMS PATROLLER (D 07) - Ruler-class Ecort Aircraft Carrier

Edited by Gordon Smith, Naval-History.Net

HMS Trumpeter, sister-ship (Navy Photos, click to enlarge) return to Contents List 

RULER-Class Escort Aircraft Carrier obtained under US/UK Lend Lease Agreement.† A mercantile which was under construction by Seattle-Tacoma Shipbuilding Corporation at Seattle. This ship was requisitioned by the US Navy for completion as an auxiliary aircraft carrier (CVE44) She had been laid down on 27th November 1942 and was launched on 6th May 1943 as USS KEWEENAW. She was formally transferred on Lend/Lease to the Royal Navy on 22nd October 1943 and commissioned as HMS PATROLLER before completion three days later. During build the ship was fitted with US Navy radar outfits


B a t t l e†† H o n o u r s


ATLANTIC 1944-45


H e r a l d i c†† D a t a

In common with other US built ships transferred under the Lend/Lease

Agreement in 1940 , no Badge for this ship is recorded in the Official

Record of Crests.



D e t a i l s†† o f†† W a r†† S e r v i c e


(for more ship information, go to Naval History Homepage and type name in Site Search



1 9 4 3


††††††††††††††† 22nd†††††† Formal transfer to RN and commissioned for service as HMS PATROLLER.

††††††††††††††† 25th††††††† Build completion and commenced Acceptance Trials

November††††††††††††† Carried out Acceptance Trials

††††††††††††††††††††††††††††††† (Note: These included Full Power trials and operation of essential services.

††††††††††††††† 22nd†††††† On completion of trials took passage to San Francisco.

December††††††††††††† Nominated for service as a Ferry Carrier in newly formed East Indies Fleet based in Ceylon

††††††††††††††† 3rd††††††††† Sailed from San Francisco for Australia with aircraft.

††††††††††††††† 22nd†††††† Arrived at Melbourne

1 9 4 4


††††††††††††††† 2nd†††††††† At Fremantle.

††††††††††††††††††††††††††††††† Passage to Cochin. India.

††††††††††††††† 22nd†††††† At Cochin

††††††††††††††††††††††††††††††† (Note: It may be assumed that aircraft were disembarked for storage at Naval Air Station

February††††††††††††††† Passage to Brisbane

††††††††††††††† 2nd†††††††† At Freetown

††††††††††††††† 7th††††††††† At Brisbane

††††††††††††††† ††††††††††††††† Took passage to Wellington

††††††††††††††† 14th††††††† At Wellington, New Zealand.

††††††††††††††††††††††††††††††† Return passage to USA


††††††††††††††† 7th††††††††† At San Francisco.

††††††††††††††† 15th††††††† Transferred on loan to US Army for deployment as Ferry Carrier.

April†††††††††††††††††††††† US Army deployment in continuation.

††††††††††††††† 6th††††††††† Passage to Esquimalt.

††††††††††††††† 23rd††††††† Arrived at Esquimalt

May††††††††††††††††††††††† Reverted to RN control

††††††††††††††† 2nd†††††††† Passage to San Francisco and took return passage to Vancouver.

††††††††††††††††††††††††††††††† Taken in hand at Esquimalt for modifications needed to suit RN requirements during

††††††††††††††††††††††††††††††† operational service

June††††††††††††††††††††††† Under modification


††††††††††††††† 25th††††††† Took passage to UK with call at San Francisco.

August††††††††††††††††† Passage through Panama Canal

††††††††††††††† 10th††††††† At Norfolk, Va

††††††††††††††††††††††††††††††† (Note: It may be assumed that aircraft were embarked for passage to UK)

††††††††††††††† 27th††††††† Took passage to Liverpool for service in Western Approaches Command.

††††††††††††††††††††††††††††††† (Note: Part of Convoy HX305 which sailed from New York on 25th. to be confirmed)


††††††††††††††† 7th††††††††† Arrived at Liverpool

††††††††††††††††††††††††††††††† (Note: HX305 arrived at Liverpool on 8th

††††††††††††††††††††††††††††††† Ship may have detached in NW Approaches. To be confirmed)

††††††††††††††† 12th††††††† Sailed for USA

††††††††††††††††††††††††††††††† (Note: Ship may have joined Convoy ON252 which sailed from Liverpool on 7th.)

††††††††††††††† 23rd††††††† Arrived at Norfolk

††††††††††††††††††††††††††††††† (Note: Ship may have detached from ON252 which arrived in New York on 22nd.)

††††††††††††††††††††††††††††††† Sailed for Clyde after embarking aircraft and may have made independent passage

                                (Note: joined Convoy CU.41 at NYC on 29 September 1944 and arrived Liverpool

                                on 10 October 1944, with thanks to Mark Mudge).

October††††††††††††††††† Passage to Clyde

††††††††††††††††††††††††††††††† (Note: Aircraft may have disembarked in Clyde or at Belfast. To be confirmed)

††††††††††††††† 9th††††††††† Under repair in Clyde commercial shipyard.

November††††††††††††† Carried out post repair trials

††††††††††††††† 10th††††††† Passage to Norfolk, Va for aircraft embarkation.

††††††††††††††††††††††††††††††† Embarked aircraft at Norfolk

December††††††††††††† Passage to Clyde

††††††††††††††† 12th††††††† Under repair in Clyde after disembarking aircraft.

††††††††††††††† 21st†††††††† Deployed for deck landing trials by CORSAIR aircraft of 1845 Squadron.

1 9 4 5


††††††††††††††† 28th††††††† Nominated for loan service to US Navy for use as a Ferry Carrier in the Pacific Theatre.

February††††††††††††††† Passage to San Diego via Panama Canal.

††††††††††††††† 28th††††††† Arrive in San Diego to embark aircraft.


††††††††††††††† 4th††††††††† Sailed from San Diego for deployment as a Ferry Carry for US Navy in Pacific.


††††††††††††††† 11th††††††† Returned to San Diego

††††††††††††††† 17th††††††† Sailed for Norfolk, Va


††††††††††††††† 1st†††††††††† Released from loan service on arrival at Norfolk.

††††††††††††††††††††††††††††††† Resumed RN service.

††††††††††††††† 4th††††††††† Embarked CORSAIR aircraft

††††††††††††††† 5th††††††††† Took passage to Clyde.

††††††††††††††† 21st†††††††† Arrived in Clyde

††††††††††††††††††††††††††††††† Nominated for refit and took passage to Liverpool.

††††††††††††††† 26th††††††† Taken in hand for refit in Liverpool commercial shipyard.

††††††††††††††††††††††††††††††† Nominated for service in Rosyth Command on completion

June††††††††††††††††††††††† Under refit

July†††††††††††††††††††††††† Under refit

††††††††††††††††††††††††††††††† Nominated for trooping duties after conversion to suit this duty in Clyde commercial

††††††††††††††††††††††††††††††† shipyard.

August††††††††††††††††† Passage to Clyde

††††††††††††††† 15th††††††† Taken in hand for conversion.

September†††††††††††† Under conversion



November††††††††††††† On completion carried out post conversion trials and took passage to Plymouth.

††††††††††††††† 13th††††††† Arrived at Devonport.

††††††††††††††† 19th††††††† Sailed for Colombo

††††††††††††††††††††††††††††††† (Note: Embarkation of personnel for passage to relieve personnel in SEAC to be

††††††††††††††††††††††††††††††† confirmed.


††††††††††††††† 15th††††††† At Colombo

††††††††††††††††††††††††††††††† Embarked SEAC personnel.

††††††††††††††† 21st†††††††† Took passage to Plymouth.

1 9 4 6


††††††††††††††† 8th††††††††† Disembarked passengers on arrival at Devonport.

††††††††††††††† 29th††††††† Sailed to Colombo.


††††††††††††††† 17th††††††† Arrived at Colombo.

††††††††††††††††††††††††††††††† Nominated for trooping duty for personnel in Western Australia,

††††††††††††††† 19th††††††† Took passage to Fremantle.

††††††††††††††† 28th††††††† Arrived at Fremantle.

††††††††††††††† 29th††††††† Embarked personnel returning form service in Pacific and too passage to UK

March††††††††††††††††††† Passage to UK



May††††††††††††††††††††††† Disembarked personnel on arrival.

††††††††††††††† 15th††††††† Sailed for Sydney

June††††††††††††††††††††††† Embarked personnel at Sydney on arrival and embarked personnel for return

to††††††††††††††††††††††††††† passage to UK


August††††††††††††††††† Embarked personnel for passage to Hong Kong

††††††††††††††† 7th††††††††† Sailed for Hong Kong.

September†††††††††††† On passage to Hong Kong.

to††††††††††††††††††††††††††† Disembarked passengers and embarked personnel returning to UK after

October††††††††††††††††† service in Far East

††††††††††††††††††††††††††††††† Sailed for return to UK

November††††††††††††† Nominated for return to US Navy and to take passage to Bermuda with

††††††††††††††††††††††††††††††† personnel on outward passage to hand-over,

††††††††††††††† 27th††††††† Sailed for Bermuda

December††††††††††††† Passage to Bermuda

††††††††††††††††††††††††††††††† Sailed for Norfolk Va after disembarking personnel in Bermuda.

††††††††††††††† 13th††††††† Formal return to US Navy custody at Norfolk


P o s t†† R N† S e r v i c e


After return to US Navy this ship was placed in Reserve and 1948 when sold for use as a mercantile was renamed ss ALMKERK she was used for trade until 1969 when resold for further commercial use and renamed PACIFIC ALLIANCE. †She ceased trade use in 1973 and was sold for demolition in Taiwan where she arrived at the breakerís yard in Kaohsing in February 1974.




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