My father told me he volunteered for the Navy as soon as WW2 started, and mentioned doing training in Scotland and near Gosport.
His naval service record, however, only starts at 13th October 1941, although there is a note staying, I think, "Entered Index NS (AS) Act 1939" - see attached. Any idea what this means?
How could I find out what he did between 1939 and 1941?