Calculator operations

Bearing	+	Bearing	=	Bearing	Add to the Bearing
		Distance	=	Leg	Make at new Leg
		Position	=	Line	Make a Line
	-	Bearing	=	Bearing	Subtract from the Bearing
	*	Bearing	=	Bearing	Multiply Bearings
Distance	+	Distance	=	Distance	Add Distances
		Bearing	=	Leg	Make at new Leg
		Position	=	Circle	Make a Circle
	-	Distance	=	Distance	Reduce the Distance (negative distances not allowed)
	*	Distance	=	Distance	Multiply Distances
Leg	+	Bearing	=	Leg	Add to the Bearing of the Leg
		Distance	=	Leg	Add to Leg Distance
		Position	=	Position	Move Position
	-	Distance	=	Leg	Reduce the Distance of the Leg
Position	+	Bearing	=	Line	Make a Line
		Distance	=	Circle	Make a Circle
		Leg	=	Position	Move Position
		Position	=	Pair	Make a set of two Positions
	-	Position	=	Leg	Find the Leg between two Positions
	*	Position	=	Line	Make a line going through both positions, halfway between them
		Line	=	Line	Find the place on the line that is closest to the position and make a line from the position to it
		Circle	=	Position	Move the position to the nearest point on the circle's perimeter
Line	+	Bearing	=	Line	Rotate the Line clockwise
		Distance	=	Line	Slide the start position of the line
		Leg	=	Line	Move the start position of the Line
	-	Bearing	=	Line	Rotate the line counterclockwise
	-	Distance	=	Line	Slide the start position of the line
	*	Position	=	Line	Find the place on the line that is closest to the position and make a (perpendicular) line towards the position
		Line	=	Position	Find the point¹ where the two lines are intersecting. If the lines are equal or no intersection is found within 1000 km from the start position, the result will be Position(0,0).
		Circle	=	Position or Pair	Same as Circle * Line
Circle	+	Leg	=	Circle	Move the center position
	+	Distance	=	Circle	Add to the radius
	-	Distance	=	Circle	Subtract from the radius
	*	Position	=	Position	Find the point, on the perimeter of the circle, that is closest to the position
		Line	=	Position or Pair	Find the point(s) where the line is touching or intersecting the perimeter of the circle. If there is no contact, the result is the point in the line that is closest to the circle plus the point on the perimeter of the circle that are closest to the line.
		Circle	=	Position or Pair	Find the point(s) where the two perimeters are touching or intersecting. If there is no contact, the result is the points on the two perimeters that are closest to each other.
Pair	+	Position	=	Triplet	Make a triangle
			-	Leg	Same as Position - Position
			*	Line	Same as Position * Position
			=	Position	Select one of the positions for further calculations
Triplet			*	Circle	Get the Circumcenter of the triangle. The perimeter of the circle goes through all three points.
			-	Circle	Get the InCenter of the triangle. The perimeter of the circle just touch the sides of the triangle.
			+	Position	Get the centroid of the triangle. The position is the gravity center of the triangle.
			=	Position	Select one of the positions for further calculations

Note 1: A line on the surface on the earth is really a circle with the radius of the earth (a Great Circle). Thus, two lines will intersect each other in two places, one on each side of the earth. Only one is shown, just change the hemisphere...