3 ms·
And how much do they change while flying from LA to NYC? Or on medium distance trips? Or out over one of the owns. Having to recalibrate continuously during a
by BoiledCabbage 5y ago
And how much do they change while flying from LA to NYC? Or on medium distance trips? Or out over one of the owns.
Having to recalibrate continuously during a flight seems very counterproductive. Especially if you drift off course and so can't recalibrate accurately.
- jcrawfordor 5y agoThe HI needs to be adjusted continuously during flight (every 15 minutes is a rule of thumb but more if maneuvering) anyway. Having to factor in the variation when doing so doesn't seem like a significant increase in workload, and the industry will quickly start producing aids to doing so.
- deleted 5y ago[deleted]
- AdamN 5y agoI think they're saying in the extreme event of needing to do declination manually you are safe and can navigate and land the plane, not that it would be a normal occurrence. The default would be using true North and all the modern navigation equipment.
- sokoloff 5y agoOn an LAX to JFK trip, magnetic variation changes from 12E to 13W, or about 1º per 100 miles. In a case of falling back to magnetic navigation from a GPS/INS failure, this would represent an insignificant increase in workload (on that trip; around the magnetic poles, it's higher workload, but it's already higher workload to do magnetic navigation very near the poles).