Segundo artigo do Ian – agora com técnicas menos básicas. Também vale a leitura!
This is a second article in a trio of interviews with Ian Corless, about Navigation for Ultra Runners & more. Read article one HERE
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In the first interview we covered the Basics of Navigation, this encompassed maps, compasses, setting your map & how to set a bearing.
The second interview was moving into intermediate navigation & it consisted of the following information & techniques:
- Declination/Magnetic Variation
- Grid Numbers/Plotting a Grid Reference
- Back Bearings
- Thumbing the Map
- Catching Features
- Aiming Off
So lets start with:
1) Magnetic Declination or Magnetic Variation:
There are 3 points at which north is seen. 1) True North, 2) Grid North & 3) Magnetic North. We are concerned with Grid North & Magnetic North.
Grid North is what is detailed on a map, its where the North/South grid lines show us the direction of north, according to the grid lines printed on the…
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