How I look at it is:
1. Manual....what we already have
2. Land mode. You move your joystick or click on the map and you get range/bearing numbers. The gun turret will auto-lock onto those coordinates. As the ship moves, the guns stay locked onto that spot on the ground and will elevate and turn by themselves to stay on target. You can put salvo after salvo into the same crater over and over all day long.
Moving the joystick probably allows the gunner to adjust the aim point left/right and further/closer from the ship. Your going to need a second player to spot for you though, since most of the time, particularily on the inland sea map you can't see your target.
3. In this mode only bearing is automatic. Your ship can turn under you and you won't have to slew the turret around to stay on target. If the aim point is 12 miles northwest of your ship, it stays 12 miles northwest of your ship. Of course, your ship is moving at 30mph, and so is the aim point.
This is nearly the same as what we have now, but the difference comes into play when the ship turns. When the guns are pointing west, and your ship heads north, then west, then south during a U-turn, the turrets are STILL pointing west.
You won't have to fight to maintain your aim when your captain is manuevering the fleet like mad.
Hans.