3 ms·
How do you apply these things without knowing where you are? True/magnetic deviation is localised. You need to know where you are to know what the localised va
by chrisseaton 5y ago
How do you apply these things without knowing where you are?
True/magnetic deviation is localised. You need to know where you are to know what the localised value is.
- lxgr 5y agoWouldn't a very rough location suffice, i.e. something that could be either manually set (for general aviation and shorter distances), derived from a VOR station identifier or similar, or just estimated via dead reckoning/an INS? In other words, if you don't even have a rough idea of where you are, what good will a magnetic heading do?
- chrisseaton 5y agoRough yeah - but I think it does change by integer degrees from actual map sheet to map sheet, so you could probably drift a couple of degrees without knowing it within an hour or so of flying.