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    Re: More on the North Magnetic Pole (NYT)
    From: John D. Howard
    Date: 2019 Feb 6, 16:23 -0800

    Frank,

    They still number runways with mag. headings is because most airplanes do not have a way to know true heading.  The vast majoty of airplanes are what is called " general avation " and do not have the new GPS or electronic flight instruments.  By ( USA ) law an aircraft must have a magnetic compass.  Yea, most small airplane pilots have a hand held GPS unit but it is illegal to rely on it for flight.  Only the instruments installed and certifed by a FAA inspector can be leagely used.

    John H   14S 170W

       
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