Conventional means of using V.O.R. and D.M.E. to give a geographical fix on the Topographical Chart 280mm in length, the BPC-1 is manufactured in clear plastic with black lettering and graduations.
Designed to establish the aircraft's bearing and distance from p to three places or beacons, it comprises a central compass rose with reciprocals and three arms graduated to 60 nm in 1:500,000 scale
