INS wind information

[Navajo King]

Does anyone know if the wind information from the INS is given as degrees magnetic or true?

Thanks...

[404 Titan]

Magnetic unless you are in the polar regions where everything you are doing is referenced to true north.

[piontyendforward]

The raw INS, IRU and IRS units all display wind as degrees true. The basic unit must have a data base to convert from true degrees. An FMC or FMGS is the usual way of adding the mag correction.

Position reports oceanic are degrees true.

[404 Titan]

piontyendforward

You are quite correct. I was assuming that Navajo King was referring to what was readily displayed to the pilot from the INS data. In the aircraft I fly unless I delve deep into the FM it isn’t displayed to me. What I do get displayed to me is wind information on the Nav display in deg magnetic after it has been processed by the FM from the IRS.

[Bill Smith]

Isn't pionty spelt "pointy" ??

[piontyendforward]

Not when you are registering after a few cold ones after work, without a spell checker looking over your shoulder.