Pentax R-200 Series Instruction Manual page 165

Remote
1. CYLINDER FACE
Angle
2. FIXED PLANE
Angle
SP
3. ROTATED PLANE
Angle
SP
1. Cylinder
Station
Point
The Remote measurement is performed on the inner surface of
the vertical cylinder as shown left.
Cylinder
Fixed
The Remote measurement is performed on the fixed plane,
Plane
which is perpendicular to the sight of the reference point
as shown left.
The Remote measurement is performed on the Rotated
plane, which is always perpendicular to the present
Rotated line of sight and induces the reference point as shown left.
Plane
3. Rotated
Reference P.
Coordinates
100
2. Fixed plane