List of ship commissionings in 1940 explained

The list of ship commissionings in 1940 includes a chronological list of ships commissioned in 1940. In cases where no official commissioning ceremony was held, the date of service entry may be used instead.

Date	Operator	Ship	Class and type	Notes	Ref
18 January
1 March			weather ship	ex-fishing trawler Gustav Adolf Kühling
6 March			oiler
unknown date	United States Coast and Geodetic Survey		survey ship	entered service in spring 1940
1 April
6 April
20 April
23 April			Naval trawler	ex-Malangen, captured from Germany
25 April			aircraft carrier
28 May
13 June		Tiger	torpedo boat	ex-Norwegian Tor
15 June
17 June				recommissioned from reserve	^[1]
27 June
8 July			weather ship	converted sealer
24 July
1 August
7 August
20 August
21 August
22 August				completion date
4 September
9 September				ex-USS Aaron Ward, commissioned at Halifax upon transfer from the United States Navy under the command of Cmdr. Frank H. E. Skyrme	^[2]
9 September				ex-USS Abel P. Upshur, commissioned at Halifax upon transfer from the United States Navy	^[3]
18 September
23 September				ex-USS Abbot transferred as part of the destroyers-for-bases deal
24 September
2 October
16 October
23 October				Ex-
23 October				Ex-
23 October				Ex-
30 October			oiler (1939)	ex-merchant tanker Seakay
30 October
4 November			oiler	ex-Esso Trenton
13 November
26 November				Ex-
27 November
5 December				Ex-
5 December				Ex-
5 December				Ex-
11 December
11 December
unknown date			seaplane tender	converted merchant
unknown date			weather ship	ex-

Notes and References

1. Web site: Parsons . Luann . Abbot I (Destroyer No. 184) . Dictionary of American Naval Fighting Ships . Naval History and Heritage Command . 19 August 2019 . 9 April 1981. "Abbot was recommissioned on 17 June 1940".
2. Web site: Aaron Ward I (Destroyer No. 132) . Dictionary of American Naval Fighting Ships . Naval History and Heritage Command . 13 June 2019 . 1 September 2016 . On 9 September 1940, Aaron Ward was decommissioned at Halifax, Nova Scotia. Transferred to Great Britain as one of the overage destroyers traded to that nation in return for the right to establish American bases on British possessions in the western hemisphere, she was commissioned in the Royal Navy that same day as HMS Castleton, 44-year old Cmdr. Frank H. E. Skyrme, RN (Ret.), in command..
3. Web site: Abel P. Upshur (Destroyer No. 193) . Dictionary of American Naval Fighting Ships . Naval History and Heritage Command . 11 September 2019 . 23 February 2016 . British on 9 September 1940. She was assigned to the 1st "Town-class" Flotilla.