Jaus,
When you man one of the big guns on the cruiser, and you are wanting to shell a target from long range, here is what you do. Go ahead and click on a gun position (one of the big circles on the cruiser). Then you want to press "e" I think it is ... or maybe w. You want to go into LAND MODE. It will say LANDMODE under the bearing information in all caps. Once in land mode, pull up your clipboard. At that point, use your mouse to click on a target on the map. For example, use insert and zoom to zoom all the way in on the yellow dot at a field, its the town. Then click on the yellow dot. Then fire! Before you fire again, you will need to click on the dot again. This also works for the airfields. You can click on the airfields and begin to drop objects at the field.
I believe the range for the CV guns is around 35K - anything further than that and your LAND MODE will not work.
Hope this helps, shoot me an email if you have any questions...nimitz@huckabay.net
Nim