Plane and simple distance + elevation. It sounds like it can shoot in a straight line over the horizen on open water. Eventulay with out uplifit it would just hit water with out loosing speed or drop.
I could be wrong as im a computer scienets not a rocket one. Computers are harder.
Also im a former cannoneer from the army.
So i understand a littel bit about direct/ indierct fire from a cannon.
I was in when the computers took over the calculations.
We went from stop and fire for effect bieng 3 hours to 30 seconds. And started hiting a soada can every time. With a howetzer.
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