History — 602.37

602.37 Except where otherwise authorized by an air traffic control unit, each flight crew member who occupies a flight crew member position that is equipped with an altimeter shall (a) when flying from the altimeter-setting region into the standard pressure region, set the altimeter to 29.92 inches of mercury or 1,013.2 millibars immediately after the aircraft’s entry into the standard pressure region; and (b) when flying from the standard pressure region into the altimeter-setting region, set the altimeter to the altimeter setting of the nearest station along the route of flight or, where the nearest stations along the route of flight are separated by more than 150 nautical miles, the altimeter setting of a station near the route of flight immediately before the aircraft’s entry into the altimeter-setting region.