The compass and the map: how to navigate the terrain
Remember, Dasha-Pathfinder was disgusting drug card bad voice for a minute sang a strange song, «I – map» consists of two words: «I» and «map»? Of course, I remember. And the Dashi was a compass and a funny soundtrack «turuturuutuuu Dasha». It is in these three things lies the success of Daria.
What am I? In addition, if you want to catch cheaters and lightning fast to navigate, you just need to learn how to use a map and compass. It’s not easy, but a little more complicated than cut with a chisel patterns on the cracked MDF. In the campaign, at home, for Ponta in front of friends and descendants — this skill will not be superfluous. Moreover, a real man should be able to get out of the woods sensible, civilized and pubescent.
Where to begin? With the simple steps: put the compass on the map so it will be much easier to handle.
Before we do that, let’s dig a little deeper to understand the situation. The fact that true North and magnetic North do not coincide. True North is at the top of the earth, the Northern magnetic pole is currently off the coast of Greenland. The angle between true North and magnetic North is quite large, so this caveat must be considered.
Mainly in the Western parts of the country, the compass needle will deviate to the East from true North; in the Eastern regions the opposite is true — the arrow will deviate to the West from true North.
What happens if you don’t adjust the deviation of your compass? And anything can happen, especially in the wild. Deviation even at 14 degrees can be completed in such a good deviation from the route.
1. First you need to know the degree of deviation. Here you can help of the Internet, curiosity and minute search.
2. For example, your magnetic deviation is 4E: to do this, turn the compass and move the pointer arrow toward the red markings, designated as «E DECL».
3. Secure and use on health.
What to do if your compass cannot be set? Then put down the screwdriver and apply elementary arithmetic.
If you’re on the East from a straight line to the magnetic pole, add a degree of deviation to the benchmark. If the West, on the contrary, subtract. That is, you’re stuck in the steppes of Kherson, what to do? Add 14 to 180 degrees. 194 is the real benchmark.
You can make it even simpler to stick to the compass stickers with the right guide.
The reference to true North
Now it’s time to learn to navigate around the map using the compass. Fortunately, this is easy. The first step is to ensure that the line North on the map coincides with your area. Maps are always North up, it is necessary to consider, not to get messed up.
How to navigate:
1. Put the compass on the map. Look where the red arrow indicates.
2. Turn the map so that North on the map was in the same direction where the arrow points.
Transfer of reference point from the compass to the map
1. Take a bearing to a visible landmark with the help of a compass.
2. Determine where you are on the map and the compass put the point on the map.
3. To turn the compass until the North on the bezel will indicate the top of the map, and the approximate line of the compass be parallel to the vertical grid lines of the map. The base edge of the compass now points in the direction of the visible reference from which you took your bearings.
Where am I?
Let’s say you went camping. You have a compass, stew, axe, map and absolutely no understanding of where you are in relation to the map.
Let’s start with the least frightening situation when you know where you are: go over the mountain and see the other. And it is unclear where this place is relative to the map. All you need to do is send the landmark in the direction of the unknown area. The arrow shows 176 degrees? All right. Then use the above method.
Much worse when the whereabouts are unknown. In this case, no need to despair, there is a way out. Don’t forget, you have a map and a compass. It is easier to determine the point of standing on the map next to some local subject matter depicted on the map (the intersection of roads, a separate stone, and the like). In this case, the location on the map conventional sign-object is the required point of standing. Low accuracy and the less the farther targets.
A compass magnetic azimuths are measured on benchmarks. Then from the landmarks on the map via the directional angles preconceputa direction, the intersection of which gives the point of standing. Pay attention, when the distance to targets about 5 km, the error in determining the point of standing can reach 600 m.