Wikipedia
Maneuvering board
A maneuvering board is an aid to navigation. It is typically a writing surface with a pre-printed compass rose of polar coordinates about a central point, often including adjacent linear scales, and sometimes a time/speed/distance nomogram. With the aid of a marking device, dividers, and parallel rulers, the maneuvering board provides a template for graphical solution of relative motion problems.
Usage examples of "maneuvering board".
The ships were about ten miles apart when Nillson switched on the light underneath the Bial maneuvering board next to the radar set and prepared to transfer the blip's changing position to paper.