either:
- local database boats
- vrtool remote boats [running on localhost or another machine]
Note: It does not control MP boats

Still, one can use MP boat data to control vrtool boats
( see the follow boat script)
//---------------------------------------------
// "tack upwind" - boat script
// - boat will alternate tacks upwind at TWA=42
// - use best sail
//---------------------------------------------
function OnNewPosition() {
var courseLeftTack = Boat.TWD -42;
if (courseLeftTack<0) courseLeftTack +=360;
var courseRightTack = Boat.TWD +42;
if (courseRightTack >=360) courseRightTack -=360;
//alternate tacks upwind
if (Boat.Course==courseLeftTack)
Boat.Course=courseRightTack;
else Boat.Course=courseLeftTack;
Boat.Sail = Boat.BestSail;
Boat.Commit();
}