Modern Naval Rules for the 21st Century. The rules have been designed to give players an accurate, yet manageable game in a 2-3 hour playing time. In these rules, combat occurs in three distinct zones. (1) Within the horizon. (2) Over the horizon and (3) Underwater. The horizon has a nominal range of up to 24 inches, while beyond the horizon is limited to 48 inches or the average width of a gaming table. Most torpedo attack ranges are limited to 12 inches, although some torpedoes can operate beyond the horizon. The game system allows for a movement rate of 8” per game turn for all vessels and unlimited for aircraft. This gives a reasonable appearance of movement for 1:3000 scale ships. These rules are intended for ships in the 1200th /3000th or 6000th scale. All dice are D6.