NAVAL Naval combat units should have zones of control (except subs). That would allow effective convoys of embarked units. Ship-to-ship attacks are far too weak. It can take multiple turns to sink an enemy ship. Naval combat should be resolved quickly and decisively. This is also necessary to make effective convoys. Embarked units should only deploy from cities with Harbors. It should take shields or gold to embark them, but once they have been outfitted, then they can work as they do now. Oar and Sail was also the time when ships could engage in melee combat, boarding and even capturing enemy vessels. AI should build more ships.