Ok, thanks very much for the fast reply.
Yeah I guess I thought it sounded very 'British' and wasn't sure if it would really be used by A-10 pilots as mentioned in the book.
How does the 9-line factor in when in orbit over known friendly positions? It seems like in the book it's a more fluid rapid call.
Like the first RPG attack at the beginning he calls for A-10 guns runs fairly informally.
Would it literally be "I need you to strafe 200 metres south of our position in the tree-line.." type stuff?