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Archive for the ‘Land Navigation’ Category
Loving the outdoors is a learned concept. It normally starts at a very young age; therefore, parents do play an important role in forming that life-long relationship. However, certain factors may preclude this from happening – scarcity of time , general disinterest, lack of knowledge, or even a genuine concern about safety.
These are valid reasons for non-involvement but conversely, the participative positives far out-number the negatives. Leading a healthy and balanced life-style are crucial to longevity. Outdoor activities can help by reducing daily stress and tension; it further strengthens family bonds and provides a sense of accomplishment to all who participate. Some of the most popular outdoor activities include swimming, jogging, cycling, hiking, camping in a tent, and boating activities.
Suggest you discuss this with the family at the next opportunity, but don’t be surprised if there is resistance. The first step is always the hardest, and for some that will be turning off the television. Engaging in outdoor activities has no substitute for staying healthy and enjoying nature at the same time. HAVE FUN!
Any experienced camping father will tell you that the most important ingredient to an enjoyable camping trip is to keep the wife and kids happy. Is this task age dependent, you darn right! However, over the years, I have found that all participants are fairly easy to satisfy when they are seeing, doing, and/or learning new things.
Do not take your family out and set them up at a camp-site without some organized activities. These activities should take the age of participants into consideration and be both educationally challenging and fun-filled. This can cover the spectrum of taking toddlers out on a camp-site show and tell – to – setting up a Land Navigation Course for rambunctious teenagers. Either activity would not be soon forgotten!
During this day and age of television, computer games, i-phones/i-pads and fast everything, it is important that we do not lose touch with the basic life essentials of clean air/water and a healthy environment.
When navigating with a compass on a specific azimuth/direction, never walk with the compass in the open position. It’s not only hard on the compass, it further subjects it to possible damage ; plus, it’s not accurate when used this way.
It is better to identify an easily recognizable landmark on the azimuth/direction line of movement. These landmarks or steering marks can not be based on map study but rather what you see on the ground. They are singularly selected and progressively replaced as the march continues. They’re normally on or near the highest point along the azimuth/direction line, and you would navigate from one steering mark to the next. Considerations for a good steering mark would be:
- Easy to recognize as you progress forward based on color, size, and/or shape;
- The highest and furthest steering mark is normally the best. It should be continuously visible as you move forward.
- Steering marks at night should be based on unique shape not color (at night red appears black).
- During hours of limited visibility or when natural steering marks are not available, use situational imagination and expedience. Example: Send out a human (far as you can see): 1. direct them to azimuth line; 2. move to them; 3. repeat the process. It’s slow but workable.
There are binoculars and/or night vision devices that would simplify movement during the hours of limited visibility.
Movement by Dead Reckoning consists of two basic, fundamental Map Reading/Land Navigation steps:
- The use of a protractor and graphic scales to determine the direction/azimuth and distance from one point to another on a map.
- Use of a compass and some means of measuring distance to apply this information on the ground.
Essentially, Dead Reckoning normally begins with the determination of a polar coordinate on the map and ends with the process of finding it on the ground. This process will require the knowledge and ability to apply advanced Map Reading/Land Navigation and Compass principles, techniques, and skills.
Movement by Terrain Association is quicker, less tedious, more forgiving and fun than is Dead Reckoning (dependent on previous location/computations). However, there will be times during movement by Terrain Association when you will need to stop and confirm your position through either plotted or estimated resection.
Errors made using Terrain Association can be corrected fairly easily because you are comparing what you see on the map with what you find on the ground. But, you must be ever mindful that a map is only a previous picture of the earth’s surface drawn to scale. It may or may not be totally representive of what you’ll find on the ground. Some features, especially man-made/influenced, will change with time.
- Matching the Terrain to the Map using Terrain Features: By observing the map’s contour lines, determine Major Terrain Features (hilltop, valley, ridge, depression, and saddle). From a vantage point, compare what you see on the map with what you should see on the ground.
- Compare Vegetation Depicted on the Map: But, be conscious/mindful that it can change overnight from natural accidents or man-made influences.
- Using the Hydrography: Use in-land bodies of water; their shapes, sizes, and direction of water flow.
- Man Made Features: This is an important part of Terrain Association. You should be familiar with the symbols used; consider the map’s age; but, most important, nothing is permanent – if it can be built, it can be torn down!
This method of ground movement will require not only knowledge but a competency in Map Reading, Compass, and Navigational Skills.
A needed preliminary step to map/ground association is to orient the map with the lay of the land. After orientation, if you plot your location on the map, and while doing it see a hill top 2000 yards to the northwest, you should be able to look up and see that same hill top to your right-front at 2000 yards.
The method used to orient the map with the ground depends on what you’re doing. If all you want is a quick analysis, determine north (compass) and point the top of your map in that direction, and map is generally oriented. But, if you’re intention is to determine/plot directions or azimuths on the map and accuracy is critical, the method used should be exact, deliberate and allow no errors:
- Place the map on a flat surface;
- Open compass and place it (straightedge) parallel with a North/South grid-line.
- Keeping the compass aligned, as directed above, carefully rotate the map/compass (together) until the magnetic arrow is below the fixed black index line of the compass (almost oriented);
- To further compensate for the small Grid/Magnetic (GM) angle change, rotate map and compass in the direction of the magnetic arrow in the declination diagram. Whether movement is right or left, rotate the map/compass that small amount (degree/mils) indicated by the G/M angle. The number of degrees/mils of rotation will be reflected under the fixed index line of the compass.
The map and compass are now oriented in accordance with map’s Declination Diagram.
We have already established that the top of the map always reflects North, map’s right: East, bottom: South, and the left (as you look at it) would be West.
Based on the vast information contained in the map, including the many different types of terrain and other features; coupled with your Map Reading/ Land Navigation knowledge and skills, it is fairly simple to start visualizing how the land/terrain must appear in relation to your position on the map.
This, couple with your knowledge of the compass and various land navigational techniques, will assist in your map study and terrain/map association. It should culminate with committed movement on the ground. The key to its success is in preparation; it must be as-slow-as necessary, methodical, and very deliberate.
Determining distance is extremely difficult and the most common source for error in cross-country land navigation.Establishing an accurate pace-count is very important. A pace is equal to one normal step. You must determine how many paces it takes you to walk 100 meters/yards. The average pace for an adult male is 30 inches in length. However, the following, sustained conditions will affect that pace and must be considered/accounted for:
- Pace lengthens on a down-slope and shortens on an up-grade;
- Head-winds shorten the pace – tail-wind will increase the pace;
- Sand, gravel, mud, snow, and similar conditions tend to shorten the pace;
- Falling snow, rain, or ice cause the pace to be reduced;
- Excess clothing and boots with poor traction will affect the pace length;
- Poor visibility such as fog, rain, or darkness will shorten your pace.
In the absence of electronic devices, establish the minimum of a 100 meter confirmation course and validate your pace-count. Terrain and environmental conditions should be duplicated as-much-as possible.
If your game is serious land navigation, there will be times when all you have that is useful to navigate with is an azimuth, your compass, the straight-line distance in yards/meters to where you‘re going, and your two feet to get you there.
For me, the difficulty is not following the compass reading but rather keeping track of the distance traveled. When you get 10,000 meters into a 20,000 meter leg, things have a tendency to start running together – was that 9,500 or 9,600 meters. Your memory will play tricks on you if you don’t have a device, system, or way of keeping track of what you’ve done.
Ideally, you’ll have a trekking buddy that will do that for you, and all you’ll have to do is stay on course. A simple thing I’ve done, to keep track of the distance traveled, was to use a couple foot-long, 1/4 inch ropes/cords. Each time I walked 100 meters, I would tie a knot in one of the ropes. When I had ten knots in the rope, I would tie one knot in the other rope. You would continue this process until the desired distance has been traveled. What is critical about this is that you must know how many steps it takes for you to walk 100 meters.
The Compass to Cheek method of holding a Lensatic Compass is used almost exclusively for sighting. Obviously, if using, there must be enough light to see the far distant aiming point/object. The following sequential steps can be used to place the compass into operation:
- Open the Lensatic Compass cover (w/sighting wire) to a vertical position.
- Pull up the sighting lens slightly, place thumb through the thumb loop and provide a steady base by forming a fist around the thumb with four remaining fingers.
- Take second hand and grasp supporting hand and depict in diagram above.
- Lift compass to cheek and look through the rear-sight slot and align the front-sight hairline with the far distant aiming point/object.
- Glance down at the dial through the eye lens and read the direction/azimuth in either degrees or mils.
Remember, the direction/azimuth obtained with a Lensatic Compass is a magnetic reading and must be converted to a grid direction/azimuth before plotting on a map.












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