Square protractor (13.5 cm sides) in flexible Plexiglas for preparing flights and, in particular, managing diversions.
4 graduation scales on the sides for use with a 1/500,000 scale map:
- distance in NM
- windless time in minutes for aircraft with Base Factor 0.5 (120 kt)
- windless time in minutes for aircraft with Base Factor 0.6 (100 kt)
- windless time in minutes for aircraft with Base Factor 0.7 (85.7 kt)
12 useful navigation formulas are recalled in the center (calculation of Base Factor, calculation of drift, calculation of crosswind, ...)
Comes complete with lanyard for precise course measurement.
Versatile instrument ideal for private and professional pilots!
