Naval History Homepage and Site Search




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

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

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



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




                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.




back to Contents List
or Naval-History.Net

revised 16/10/10
further editing and formatting is required