I hope this is posted in the correct section. My grandfather served in the Second World War, I believe he ended as a Lieutenant in the RNVR. His service number was MX 65985 S/A. Does the MX or S/A mean something? I have applied for his service record, which has yet to arrive. We have have absolutely no idea in what ship(s) he served in, although my own father was born in Dunfermline as they were stationed at up that way, there is also family talk that he served on Minesweeepers. Any help would be appreciated.