An expansion for the 3rd Edition Harpoon, it contains pre-made submarine forms for 7 different countries, and over 35 submarines.

It includes:

USA - Barbel class, Los Angeles class, Imp. Los Angeles class, Narwhal class, Permit class, Seawolf class, Skipjack class, Sturgeon class

USSR - Akula class, Alfa class, Charlie I class, Charlie II class, Echo II class, Echo II Mod class, Foxtot class, Juliett class, Kilo class, November class, Oscar I class, Sierra class, Tango class, Typhoon class, Victor III class, Yankee SSN class

UK - Oberon class, Swiftsure class, Trafalgar class, Upholder class, Valiant class

French - Agosta class, Daphne class, Rubis class

Italian - Salvatore Pelosi class, Nazario Sauro class, Enrico Toti class

FRG - U-13 class, Type 211 class

Dutch - Zwaardvis class