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guides:land_nav [2017/04/21 15:49] thendash added compass section |
guides:land_nav [2017/04/21 16:25] thendash added bearing and intersection sections |
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===== NAVIGATION TECHNIQUES ===== | ===== NAVIGATION TECHNIQUES ===== | ||
+ | ==== BEARING ==== | ||
+ | Technically //azimuth// is the proper term, but the term //bearing// is commonly used to refer to the direction to an object or location | ||
+ | in relation to magnetic North. | ||
+ | |||
+ | In ARMA we do not need to worry about the difference between magnetic bearings measured with a compass, and grid bearings measured on the | ||
+ | map. | ||
+ | |||
+ | **Taking a Bearing** | ||
+ | |||
+ | To measure a bearing from your current location to a visible object: | ||
+ | - Line up the //sighting wire// on your compass with the object | ||
+ | - Read the bearing in degrees where the //index line// intersects with the //inner ring.// | ||
+ | |||
+ | **Back Bearing** | ||
+ | |||
+ | A back bearing is the opposite direction of a bearing. It is commonly required for use during land navigation. | ||
+ | |||
+ | To convert a bearing into a back bearing: | ||
+ | * **Add 180 degrees** if the bearing is **180 degrees or less** | ||
+ | * **Subtract 180 degrees** if the bearing is **180 degrees or greater** | ||
+ | |||
+ | ==== LOCATION ==== | ||
+ | **INTERSECTION** | ||
+ | {{ :guides:intersection.png?direct&300|Click to view full size}} | ||
+ | |||
+ | Intersection is the location of an unknown point by successively occupying at least two known positions on the ground and then map | ||
+ | sighting on the unknown location. It is not often used in ARMA, but can be used to locate the position of an otherwise inaccessible location. | ||
+ | **Steps:** | ||
+ | - Measure the direction to the target from known location 1. | ||
+ | - Draw the bearing from known location 1. | ||
+ | - Move, or communicate with someone at a different known location. | ||
+ | - Measure the direction to the target from known location 2. | ||
+ | - Draw the bearing from the known location 2. | ||
+ | - (Optional)Repeat from subsequent known locations as desired. | ||
+ | - The **intersection** of the drawn bearings is the location of the target. | ||
+ |