Rare Signal Drift, Night An Mark 4 Us Army Air Corp

RARE SIGNAL DRIFT, NIGHT AN MARK 4. These signals are employed as follows. To determine the drift of the plane from which the signal was dropped. To mark the initial point of contact with a submarine. To mark an object to which an aircraft desires to call attention of a surface vessel. To determine the wind direction before landing. To mark the landing deck on aircraft carriers for night landings. To mark the location of the surface of the water for emergency night landings.