Courtesy of the History of Wargaming Project ran by the indomitable John Curry, but just as importantly coming highly recommended by both "Tim" and "Bob", I have (finally) purchased the infamous Fletcher Pratt Naval Wargame Rules of WWI and WWII (see below):
Purchase number two was the prerequisite "golf tees" to be used inverted as "splash markers" in teh game (see below):
The shape of things to come "a straddle" (see below):
Time to depart to the loft to dig out the 1:1200 Airfix "Sink the Bismarck" and Revell "Battleship series" waterline models!