You see a double white cross in a signal square, what does this mean?
a. Glider flying in progress
b. Tow ropes and banners may be dropped
c. Runway unfit for aircraft movement
d. Aerodrome unfit for aircraft movement
a. Glider flying in progress
b. Tow ropes and banners may be dropped
c. Runway unfit for aircraft movement
d. Aerodrome unfit for aircraft movement