society > travel > travel by water > vessel, ship, or boat > equipment of vessel > navigational aids > [noun] > board or scale on which course is indicated (3)
a board marked with the points of the compass, having holes into which pegs may be inserted to record a ship's course and speed for use in dead…
Nautical. A board used to record a ship's course and speed for use in dead reckoning; short for traverse board n. at compounds. Obsolete.
a type of slide rule used in navigation to calculate longitude and latitude.