It currently operates the Sikorsky CH-148 Cyclone from CFB Shearwater in Nova Scotia, Canada.

423 Squadron RCAF was a World War II unit of the Royal Canadian Air Force.

Formed in 1942 in Oban, Argyll, Scotland for General Reconnaissance duties, it later moved to RAF Castle Archdale, Northern Ireland where it flew Sunderland flying boat patrol bombers.

It flew CH-124 Sea King helicopter, which it used in support of Royal Canadian Navy (RCN) warships during the 1991 Gulf War and in the Arabian Sea after the 11 September 2001 terrorist attacks.

On 30 April 2020, an RCAF CH-148 from 423 Squadron, attached to HMCS Fredericton and based at the Shearwater Heliport crashed in the Ionian Sea during a NATO Mediterranean exercise.