A fundamental FieldCraft skill is using a map and compass.
Brunton manufactures a wide variety of professional and recreational compasses. They also offer this set of Backcountry Use Quick Reference Cards as an aide memoire.
The eight waterproof cards include:
1 Map Slope Indicator Scale (works with both metric and standard map scales)
2 How to Orient a map to true north
3 Taking a map bearing
4 Sighting a field bearing
5 Travel a compass bearing
6 Triangulating a location
7 How to use Romer Scales
8 Suggestions when you are lost
9 Water tips
10 Common knots
11 Calculating hike times
12 Metric and Standard Topo Buddy scale cards
www.brunton.com/products/quick-reference-card-1