Royal Navy What is a GAO?

[aeroraider]

I picked up a WWII Royal Navy helmet painted with Lieutenant Commander's rank insignia and the letters "G.A.O". What is a G.A.O.?

Thanks for any help!

[byterock]

New one on me and I collect lists of these and have a few books on the subject came up with nothing.

I was thinking I might be 'French Canadian' but nothing there either.

Sorry

[aeroraider]

Curious

I am not finding much.

General Accounting Officer?

The helmet has the names of the Captains of the ship on the inside. I am wondering if the letters might be an "in-joke"? Maybe the helmet was passed to each new Captain as a tradition.