The sign accompanying the signal square
adjacent to the control tower. It reads
This 15-ft. white square is a scaled down version of the 40-ft square used by
WWII control tower personnel to communicate with pilots, to minimize radio
traffic, and to prevent Germans from intercepting radio transmissions. Red,
yellow, and white markers within the square signaled pilots how and were to
land, or prohibited landing. In this example, the yellow triangle indicates
that the Standard Beam Approach was in operation, the red with yellow diagonal
stripe that pilots should observe caution on landing, and the white T the
direction in which pilots should land.
The signals for military airfield, caution on landing, field closed, gas
attack/do not land, righthand traffic, landing direction, use runways only, gas
- all clear, look at wind tee, standard beam approach in operation, parachute
dropping area, and all a/c recalled are also illustrated.
The Airways Museum & Civil Aviation
Historical Society has additional information
regarding the signal square.