plotting board
noun
Navigation.
a transparent table on a ship, used as a plotting sheet.
Military.
a device based on a map or other scale representation of a region against which artillery fire is to be directed, for use in directing artillery fire against a fixed or moving target.
Origin of plotting board
First recorded in 1900–05
Words nearby plotting board
plotinism,
plotinus,
plott hound,
plottage,
plotter,
plotting board,
plotting sheet,
plotty,
plotz,
plotzed,
plough