Want To Play?: Imperial Navy Idenitification Solution

As promised, I'm providing the answers to yesterday's puzzle. The Imperial Navy Identification proved to be very popular: it seems people really do 'Want To Play'! Thanks to all who took part. If you haven't played and would like to before being supplied the answers - stop reading now and click here. Otherwise, here is the puzzle and the answers. Click for close-ups.





Answers:

A: 4

B: 6

C: 2

D: 3

E: 7

F: 1

G: 5