No. 428 Squadron RCAF
On 7 Nov 1942, he assumed command of No 428 (RCAF) Squadron, standing up the squadron in No. 4 Group. As the OC, it was noted that "Wing Commander Earle was a grand chap, one who can genuinely be called, 'One of Nature's Gentlemen'. He was well liked by the Canadians and sadly missed when he left on promotion to group captain in February 1943. He flew two operations from Dalton, occupying the astro-dome. He had previously been flying Fairey Gordons in the Middle East (Iraq), and found the Wellington difficult, partly due to his eyesight not liking the English skies, and partly as he was not a tall man." After only three months, he left 428 Bomber Squadron (RCAF) as an acting group captain on 7 Feb 1943, when he was assigned as the station commander of RAF Ridgewell and then RAF West Wickham, late in 1943, then as a temporary group captain. He ended the war as Air Officer Commanding No. 300 Group RAF (RAF Transport Command) in Australia.
No. 428 Squadron RCAF
As an RCAF Air Defence Command Fighter Squadron, 428 AW(F) was allocated to No.3 ADCC Operational Sector, its Operational Control Centre located at RCAF Station Edgar ON. No.3 ADCC coordinated the operations of No. 31 Aircraft Control & Warning Squadron (also located at RCAF Station Edgar), No. 32 AC&W Squadron at RCAF Station Foymount ON, No. 33 AC&W Sqn at RCAF Station Falconbridge ON, No. 34 AC&W Sqn at RCAF Station Senneterre QC, and 912 Squadron (USAF) at RCAF Station Ramore ON. Responsive to the Sector Commander, the Fighter Control Operators at No.3 ADCC provided the squadron's 'Ground-Controlled Interception' direction, through the signing of the NORAD Agreement in 1958.
Given the serious nature of the Cold War, everything that flew into the Canadian Northern Air Defence Region had to be detected and identified within two minutes by RCAF or USAF Aircraft Control & Warning Squadron personnel. If an aircraft was unknown at two minutes, fighters were scrambled to intercept, to find out why the aircraft could not be identified, to force it to land, or to shoot it down. Receiving interception notification from No.3 ADCC at RCAF Stn Edgar, 428 AW(F) fighters, on Alert Status, were airborne within five minutes, when under reduced status 15 minutes, and one hour was permitted. To meet the standard, and when on exercise, squadron aircraft with alert crews were positioned fuelled and armed, 24 hours a day/seven days a week, in special Quick Reaction Alert hangars.