Pace counts are still useful, remember, a navigator seeks every piece of available information to determine his position. Here's the procedure I used/taught:
First, start with at least 400 meters of flat level terrain, preferably in a square (To equalize slope). Walk the perimeter, counting your steps. Divide by 4. That is your base pace count for 100 meters. (Let's assume it's 135 steps per 100 meters). Write that number in the little green memorandum book in your shirt pocket.
That is the LOWEST pace count you will ever have. Why? Because it was daylight, you are fresh, with no load, on level ground, in good weather, etc. From then on everything else will increase your pace count.
Night - You will take shorter steps, and will wander more. That means more steps to travel 100 meters.
Loaded/Tired - Your steps will shorten and you will tend to look down. You won't follow an azimuth as accurately. Result: even more steps per 100 meters.
Uphill - You will take shorter steps, and you will be traveling a greater distance than what a point to point measurement on a map would indicate. (The hypotenuse of a right triangle is always the longest side). On a 30 degree slope, moving 100 meters as shown on the map requires you to march 115 meters over the ground. Also, you will tend to "cut the contours" (zig-zag) and that will increase travel distance. For the same reason, even traveling downhill will not usually result in a lower pace count than your base count, and may even be greater than your base pace count.
Rain/Snow/Soft soil - All will cause you to shorten your step, and than means more steps per 100 meters.
So, based on experience, you will begin to keep a list of pace counts in the back of your memo book. It might look something like this:
Base = 137
Ruck/LBE = 145
Night = 150
Tired/Ruck/Rain = 155
Uphill (shallow) = 160
Uphill (steep) = 175
Max (Night/Ruck/Tired/Uphill) = 200
You will adjust as you go. For example, assume the first leg of a rucksack march causes you to cross a road after 400 meters. You start with a estimate of 145 steps per 100 meters. After traveling 400 meters (4 knots in the pace cord), you have not come to the road, but you see it in front of you. Continue to count steps as you cross the road. Let's say that was 20 extra steps. Hmm, must be a little more tired than you thought. 20 steps, divided by 4 = 5 extra steps per 100 meters. Next leg, use a pace count of 150 per 100 meters. After a while, you will get surprisingly accurate in measuring distance in all kinds of conditions. Your notes will help you,
and your men will trust you.
If you are keeping pace for sport navigation (orienteering), the same rules apply, but you will find it useful to count every other step (such as when your left foot strikes the ground). That way, you can add a Running pace count for cross country jaunts from control to control at a jog. The numbers will be about half that of counting every step, but again you will want a base count, followed with adjustments for weather, exhaustion, slope, etc.
There are several ways to keep track of pace, but my favorite is the simple ranger technique of a boot lace cut off and tied through the top buttonhole of the shirt, allowing the end with the little plastic thing at the tip to hang down about belt level. After traveling 100 meters, tie an overhand knot near the top of the string. Next 100 meters, tie another knot. In between knot-tying, curl up the string and stuff it in a top pocket. Day or night, slide your fingers down the string to count the knots/100 meter segments. When you get to the destination, untie the knots.
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Do a search for "pace counts" on this site and go from there.
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While the actual navigation from a point on Planet Earth to another point on Planet Earth has immense practical value (I will defer to other posts reflecting "when the batteries die, when the satellites are inoperative due to jamming or meakoning" -- meakoning: yeah, look that up or ask your MI officer)...
the ability to depart into the darkness, with only a map (maybe) and a compass (maybe) and nothing else but your wits, intelligence and courage;
with confidence in your own body (pace count) and skill in reading the ground under your feet and evidenced to your eyes ...
well, that is something that a Special Forces Soldier should possess.
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Why? Because it represents the classic definition of intelligence:
1 - A basic sense of facts, plus cause and effects;
2 - The ability to use that sense to proceed from the known to the unknown.
I don't know if MENSA uses that definition, but it is good enough for this site.
The skill and ability to proceed from the know to the unknown.
And it takes balls. Really. Balls.
https://lateralthinkingdepartment.co...le-navigators/
https://www.ifa.hawaii.edu/friends/T...of_Oceania.pdf