Wind... True or Magnetic

[Black_Dawn]

i have a question about the spot wind on the FMS/GPS

Flying in a area of medium latitude (60°-20°)in a cruise, do you select to have True or Magnetic wind direction displayed by your FMS/GPS?

thanks
B_D

[Slick]

BD, true winds are displayed on our FMS, Smiths U10.2, can't help with stand alone GPS units. Sorry. By the way I am talking about the B73NG, I believe Airbus display Magnetic winds ?.

Best Rgds

[ 17 July 2001: Message edited by: Slick ]

[erikv]

Based on common sense, I'd say that all upper winds displayed by long-range nav systems are true.
In MET reports, winds aloft are always true, whereas the winds given by tower controllers are magnetic.

Erik.

[GlueBall]

Our FMS displays Magnetic, but the INS heads show True. :cool:

[411A]

Honeywell/Trimble 8100, 9100 stand alone GPS display winds aloft in degrees true. Likewise all Collins units, I believe.

[Mister Slot]

B757/767 - The EHSI displays magnetic wind velocity if the heading reference switch is selected to "magnetic" and true when "true" is selected.

The FMC "Cruise" page and "Progress" page 2 display true wind velocity at all times, as does the IRS display.

Hope that helps.