Help with Staghound Crew Designation?

[Darren Sutherland]

Hello,

I'm hoping someone can help me decipher some information I located in the XII Manitoba Dragoons online War Diaries?

I'm looking to find out what OP CAC "C" means. The XII MD War Diaries this as my great uncle's "trade".

For context, I believe he was a crewman in Staghound F235390 C-152, C-Squadron, 15th Troop.

(T-12714, Image 1511)
War Diary T-12714 Image 1511.jpg

I've Googled and searched the MLU forum but have yet to find exactly what the designation means.

Any help would be greatly appreciated!

Thank you

Darren