
Originally Posted by
AndyA
Because if you're in a situation where the terrain is dense on features (paths, boundaries, streams, contour variations etc) it takes extra time to mentally rotate the map, time you need to be watching your feet. It's less of a problem in open featureless moorland (e.g Kinder) but get somewhere full of walls and paths and you can soon be in a mess. In these situations a compass is rarely used (you'd spend most of your time setting bearings instead of looking where you're going) so orienting the map to north is a pointless exercise.
Don't hold the Army/ML up as an example, they're training for a significantly different situation, one where pinpoint accuracy, possibly in bad weather is much more important than speed. High speed navigation when running is often more akin to 'stepping stones' as you use all the features available to 'jump' your way across the map.
Don't dismiss it; try it next time you doing an orienteering/MM event, see if it works.