The BC-1 is a comprehensive instrument designed for use with 1:250,000 Topographical and 1:50.000 Ordinance Survey Charts. Measuring 205mm x 155mm in clear plastic with an opaque circular scale. Enables easy transportation of Aeronautical Information onto Ordinance Survey Charts. The calculation of average and actual Balloon G...

For fast, simple Position Fixing on 1:500,000 Topographical Aeronautical Charts. 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...

For Professional Pilots, This i128mm square protractor has a 0-360 scale on the outside edge with reverse 360-0 scale adjacent. Location letters N.E., S.E., S.W., and N.W on corners. With aeronautical symbol cut-outs of a square, circle and triangle. Centre drilled for location and gridded in squares of 13mm(4nm). Supplied in...