A decent number of hypotheticals but some of them require parts from other games in the series. It makes you wonder if they could have been reprinted here, expecually maps, if That Company hadn't incurred the expense of mounting the maps included. The latest installment of the award-winning Great War at Sea series arrives at the Moody household. Inside you get two small mounted maps. I suppose you could use the map from US Navy Plan Black, if you wanted, and just use the Spanish flag markers provided to mark the Spanish ports.
Counters are the same style as the previous games.
As Roger said, not a lot of counters, and most are US ships. This sounds a little dubious to me, but I don't know enough about the history of the period to say whether it could have happened or not. Basically, you go through a series of steps, playing certain operational scenarios in order and keeping track of lost and damaged ships. Every so often you get repair points which can be used to repair ships. The roll is affected, of course, by who's winning the war.