Chris Carlson is a retired submariner and together with Larry Bond, a former surface warfare officer, he writes both fiction novels and war games. They have now created a publishing company of their own. They used the data from the French firing practices in the late 1930s to make their war game about the French navy very exact. This is their website about wargames:
Regional Сommunity Оrganization
The Saint-Petersburg Submariners
& Naval Veterans Club
& Naval Veterans Club