Point Position

With point position known, there is no question about where you are, and you can use that knowledge in identifying on the map any major feature visible on the landscape. You can also identify on the landscape any visible feature shown on the map.

For example, climbers on the summit of Forbidden Peak know their point position. It's at the top of Forbidden Peak. (You can refer back to the Forbidden topographic map, fig. 4-2.) They see an unknown mountain and want to know what it is. They take a bearing and get 275 degrees. They plot 275 degrees from Forbidden Peak on their topographic map, and it passes through Mount Torment. They conclude that the unknown peak is Mount Torment.

However, if you start by wanting to find Mount Torment, do the map work first. The climbers measure the bearing on the map from where they are, Forbidden, to Mount Torment, and come up with 275 degrees. Keeping 275 at the index line on the compass, one climber holds the compass out and turns until the magnetic needle is aligned with the declination arrow. The direction-of-travel line then points to Mount Torment.

Continue reading here: Line Position

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