I do not own it and, unfortunately, it would seem the Kindle edition is messed up and cannot presently be sold.
That said, if I recall correctly, this one replaces the range guessing game with dice which, to me, kills the weird joy of Fletcher Pratt. I'll still get it when it's Kindle-ready, but I really do finally want to decide if I like FP or not.
Not that I'm any kind of WWI naval gamer anyway...