What did loadies do...?
Well, our one (this was mid-'70s) was taught by the tried and tested instructional method of "sitting by Nellie" to work the ordnance area, do photography, he knew about the galley and rations, and as time went by was educated into applying to be an AEop of the wet persuasion. He went on to become one of the city fathers and as far as I know is still at the JMF at St Mawgan.
The Ancient Mariner