When dialling in the radial course from a vor to another one should i consider the magnetic track (imt) or the true track (itt)?
thanks!
Radials are magnetic.
VOR is aligned to Magnetic, except when flying in areas like the Canadian Artic (North West Territories and Nunavut) as the magnetic pole is right in the middle of it, so the VOR’s (as well as airways, runways, etc…) are aligned with true.
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In fact, neither. If you are flying a radial then fly the radial. VORs were technically aligned with the magnetic north at the installation (and as skypilotYTS points out with the true north in some areas), but many of them haven’t been realigned for years. This can explain why you keep wandering off your planned track when following a radial.
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Exactly, so true track +/- MagVar at the location of the station. Although for all practical purposes you can use magnetic track just fine, you are usually not using VOR more then 50/60 nm out from the station. At those distances the change in MagVar becomes negligible.
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Correction: true track +/- MagVar the station is aligned to (which is, unfortunately, not the kind of information readily available anywhere).
Yes, if you want to be 100% correct. For all practical purposes I wouldn’t about it, I think I have seen MagVar in the FMS navdata base when looking up navaid info on the aircraft I’m currently flying. Not sure what this MagVar represents, probably just the location and not the navaid calibration.
Yes, true + magvar would be good enough. In the FMS database they just display the latest surveyed magvar at the location.