Help with Staghound Crew Designation?

[45jim]

This means the radio operator. In the Strathcona war diary a Sherman is crewed by a driver, assistant driver, gunner, loader/operator and commander. If the crew positions were standardized across the armoured corps at the time he was the loader/radio operator in a Staghound.

"CAC" is Canadian Armoured Corps.

I don't know if the "C" relates to his squadron, perhaps if you had the complete document it would provide that information.