Differences

This shows you the differences between two versions of the page.

--- guides:land_nav [2017/04/21 16:25]
thendash added bearing and intersection sections
+++ guides:land_nav [2017/04/21 16:48]
thendash added resection, modified resection, and polar coordinates sections
@@ Line 68: / Line 68: @@
 **Reading a grid**
-{{ :guides:gridref.png?direct&300|Click to view full size}}
+{{ :guides:gridref.png?direct&250|Click to view full size}}
 It is easy to read 2, 4, and 6 digit grid references from the ARMA map because the map scales as you zoom in and out, but you can read a
@@ Line 95: / Line 95: @@
 ===== EQUIPMENT =====
 ==== COMPASS ====
-{{ :guides:compass.png?direct&300|Click to view full size}}
+{{ :guides:compass.png?direct&250|Click to view full size}}
 The compass is a tool used to measure direction. The version modeled in ARMA is a lensatic compass with both degree and milliradian
@@ Line 137: / Line 137: @@
 ==== LOCATION ====
 **INTERSECTION**
-{{ :guides:intersection.png?direct&300|Click to view full size}}
+{{ :guides:intersection.png?direct&250|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.
-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.
@@ Line 148: / Line 150: @@
   - 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.
+  - The intersection of the drawn bearings is the location of the target.
+**RESECTION**
+{{ :guides:resection.png?direct&250|Click to view full size}}
+Resection is the method of locating your **own position** using at least two well defined locations that can be pinpointed on the map.
+The more locations available, the more accurately you can locate your position.
+**Steps:**
+  - Identify two or thee known distant locations and mark them on the map as accurately as possible.
+  - Take a bearing to location 1.
+  - Convert the bearing into a back bearing.
+  - Draw the back bearing from location 1 on the map.
+  - Repeat for other locations.
+  - The intersection of the drawn bearings is your location.
+**MODIFIED RESECTION**
+Modified resection is the method of locating your **own position** when you are located on a linear feature, such as a road or stream.
+It is easier and quicker than regular resection as it only requires one bearing to be taken.
+**Steps:**
+  - Identify a known distant location and mark it on the map as accurately as possible.
+  - Take a bearing to the location.
+  - Convert the bearing into a back bearing.
+  - Draw the back bearing from the location on the map, stopping when it intersects with the linear feature at your location.
+  - The point where the drawn bearing meets the linear feature is your location.
+**POLAR COORDINATES**
+Polar coordinates is a method of locating an **unknown position** from a known position using direction and distance to the target.
+It is often used in ARMA for locating targets for artillery.
+**Steps:**
+  - Take a bearing to the target.
+  - Estimate/Determine distance to the target.
+  - Draw the bearing from your location on the map.
+  - Measure the determined range on the drawn bearing.
+  - The range on the drawn bearing is the location of the target.