[1] Crowninshield cruised along the Atlantic coast and in the Caribbean, participating in 1921 in the fleet concentration in the Panama Canal Zone and Cuban waters.

[1] Recommissioned on 30 September 1939, Crowninshield sailed from Mare Island 25 November and arrived at Guantanamo Bay, Cuba on 10 December for duty with the Neutrality Patrol in the Caribbean and Gulf of Mexico.

Assigned to the Sixth Escort Group, Western Approaches Command, Liverpool, for Atlantic convoy duty, she fought the double-menace submarine and air attacks on vital supplies.

[1] Chelsea was modified for trade convoy escort service by removal of three of the original 4"/50 caliber guns and one of the triple torpedo tube mounts to reduce topside weight for additional depth charge stowage and installation of hedgehog.

Chelsea opened fire on the surfaced submarine and made three depth charge attacks after she dived but contact was lost and she returned to pick up the survivors from Arbutus.

[1] In November 1942 Chelsea was lent to the Royal Canadian Navy and until the end of 1943 operated in the mid and western Atlantic Ocean escorting convoys to and from Great Britain.