The CWHM Canuck was built in 1958 as a Mk.5 all weather interceptor but later converted into a Mk. 5D ECM aircraft and used to simulate enemy aircraft during NORAD exercises. The aircraft is fitted with wingtip fuel tanks instead of rocket pods to extend its range for it's ECM missions. It served in an electronic warfare role with No. 414 'Black Knight' Sqdn in North Bay, ON until Dec. 1981.