This is a game, involving elements of both roleplaying and tactical combat, in which grown men and women sit on the floor and push toy pirate ships around, going "Arrrr!"
I use Lego (tm) ships and figures for the games that I run, and the "ship class" rules are written to support Lego and similar building sets . . . but any sort of toys can be used, and these rules are emphatically not licensed or approved by The Lego Group, more's the pity. Non-Lego products that can be used with these rules include Playmobil, Pressman's Weapons & Warriors play sets, Mega Bloks (which makes some cute Viking ships), Best-Lock, Rokenbok (www.rokenbok.com) and many others. You could also adapt these rules to use the WizKids "Pirates of the Spanish Main" mini-ships.