Thanks for the extremely comprehensive comments, I greatly appreciate the time and effort that you have put into those questions. Short answers to a few of those:
All die rolls use a d6
Green ships move up to 2 hexes per turn
Blue can conduct inspections on all ships in the same hex
I'll think about the others and will aim to post an update in a day or three, I'm currently en route to Australia from the UK so I'll address this when I've landed on Tuesday
Thanks again, your comments are most welcome :)