Julie was developed as an operational system largely by the Test,Development and Evaluation flight (TD&E) of 404 Squadron, Royal Canadian Air Force based at Greenwood, Nova Scotia with support by the Operational Research scientist from the Canadian Defence Research Board. My log book shows evaluation trials conducted off Bermuda in January of 1956.
My log book shows that we demonstrated the potential of this system on 27 November 1956 to a USN Admiral, Admiral Shea, if my memory serves me correctly. As I recall he got quite excited saying drop another one (a Practice Depth bomb containing aboout 2 pounds of explosive). This demo flight probably supported the adoption of this system by the USN.
In April of 1956 I wrote the "Julie Manual", developed the training program and was the chief instructor.
In February of 1957 we trained RCAF crews from 404 and 405 Squadrons in GITMO. The following year this training was repeated at GITMO with crews frrom The RCN who flew Tracker aircraft and USN P2V7 crews. My log book shows that on 13 and 14 February I was a"screen" instructor on flights of Lt. Gregg, USN who flew P2V7 No. 175 and on 15 February of Lt Cdr Hubbard USN who flew P2V7 No. 172. Don't remenber what USN squadrons they came from. GITMO was an ideal training area because of the deep offshore water.
As for Jezebel, our TD&E flight, using the prototype equipment from Bell Labs, proved out the capability of this system which helped in this system becoming operational