403 "City of Calgary" (Helicopter) Operational Training Squadron (403 Sqn) is a squadron of the Royal Canadian Air Force located at Canadian Forces Base Gagetown. It is equipped with CH-146 Griffons and provides operational aircrew training to the crews who will fly the helicopter. The squadron also conducts operational test and evaluation, develops aviation tactics and carries out operations in support of the 1 Wing mission. It also supports the local Army requirements of the Combat Training Centre. It was originally founded as No. 403 Squadron RCAF.