BB, the difference between degrees and mils is more like the difference between inches and millimeters. They're both accurate units of measurement, but one has tighter tolerances than the other.
BB, anyone ever tell you are a few degrees off bubble? If so, they were talking about magnetic declination...lol. Murphy,I suspect that you are correct about looking at two sides of the same target. The reason I recommend the trekker is simply the cost versus reliability. There are awesome compasses out there, but so is the price. Unfortunately, most who buy one will throw it in their bag and never use it. I Suspect more get lost than broken. If you come in March, we can compare, cuss and discuss...
Mills:
There are 2π × 1000 milliradians (≈ 6283.185 mrad) in a circle. So a trigonometric milliradian is just under 1⁄6283 of a circle. This “real” trigonometric unit of angular measurement of a circle is in use by telescopic sight manufacturers using (stadiametric) rangefinding in reticles. The divergence of laser beams is also usually measured in milliradians.
An approximation of the trigonometric milliradian (0.001 rad), known as the (angular) mil, is used by NATO and other military organizations in gunnery and targeting. Each angular mil represents 1⁄6400 of a circle and is 1-⅞% smaller than the trigonometric milliradian. For the small angles typically found in targeting work, the convenience of using the number 6400 in calculation outweighs the small mathematical errors it introduces. In the past, other gunnery systems have used different approximations to 1⁄2000π; for example Sweden used the 1⁄6300 streck and the USSR used 1⁄6000. Being based on the milliradian, the NATO mil subtends roughly 1 m at a range of 1000 m (at such small angles, the curvature is negligible).
BB, the difference between degrees and mils is more like the difference between inches and millimeters. They're both accurate units of measurement, but one has tighter tolerances than the other.
BB, anyone ever tell you are a few degrees off bubble? If so, they were talking about magnetic declination...lol. Murphy,I suspect that you are correct about looking at two sides of the same target. The reason I recommend the trekker is simply the cost versus reliability. There are awesome compasses out there, but so is the price. Unfortunately, most who buy one will throw it in their bag and never use it. I Suspect more get lost than broken. If you come in March, we can compare, cuss and discuss...
Mills:
There are 2π × 1000 milliradians (≈ 6283.185 mrad) in a circle. So a trigonometric milliradian is just under 1⁄6283 of a circle. This “real” trigonometric unit of angular measurement of a circle is in use by telescopic sight manufacturers using (stadiametric) rangefinding in reticles. The divergence of laser beams is also usually measured in milliradians.
An approximation of the trigonometric milliradian (0.001 rad), known as the (angular) mil, is used by NATO and other military organizations in gunnery and targeting. Each angular mil represents 1⁄6400 of a circle and is 1-⅞% smaller than the trigonometric milliradian. For the small angles typically found in targeting work, the convenience of using the number 6400 in calculation outweighs the small mathematical errors it introduces. In the past, other gunnery systems have used different approximations to 1⁄2000π; for example Sweden used the 1⁄6300 streck and the USSR used 1⁄6000. Being based on the milliradian, the NATO mil subtends roughly 1 m at a range of 1000 m (at such small angles, the curvature is negligible).
Im thinkin this get together might be a ton of fun and worth while.
How many ppl are we up to, anyone know?
BB, do a google search for lensatic compass instructions. You should get quite a few hits that can get you started. I'll be more than happy to help show you that weekend. It's really pretty simple, but can be daunting to a newcomer. Land navigation is also a perishable skill. If you don't practice it you tend to forget it. Somewhere I have a little handout I got from the Army that explains things pretty well. If I can find it, I'll be more than happy to make a copy and send it to you if you like.
I don't know but according to BB there are gonna be "TWO of us" there. lol
2. MeOk, if youse guys/gals are planning on coming, let's hear it.. I'm making a list, so sign up!
1. Me
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