I worked in forestry for many years. I often worked in flat or rolling, heavily forested, rainy and foggy country with no visible landmarks. In country such as this, the ability to navigate with a map and compass is essential if one wishes to go home at night. Travel by dead reckoning is certainly not always necessary. But, if one does not have such navigation skills then it is much easier to get lost when landmarks disappear in the fog or the forest. To me, having a map and compass, and the knowledge of how to use them, is like having insurance; seldom needed but occasionally necessary.