You know, I wish more folk would use a map; I truly do. Fact is I
think many letterboxers find even reading a compass a chore.
How many of you have planted or found a box using "Back Azimuth?"
JugglerMouse has one of her Redwall series that is found that way.
That will show ME for teaching her about Back Azimuth.
You still puzzled? Imagine if you will that the clues say that a box
sees landmark 1 at 25 degrees and sees landmark 2 at 289 degrees. How
would you find the box?
1. Go to Landmark 1
2. Add 180 degrees to the 25 degrees, that gives you the heading of
205 degress (SSW, right?)
3. Walk along that line until landmark 2 lines up with 289 degrees.
4. You should be standing on it!
or
Repeat steps one and two above
3. Have a friend go to landmark 2
4. 289 - 180 (because the azimuth is bigger than 180 degrees) to get
the heading of 109.
5. Have the friend sight along 109 degrees and yell STOP at you while
you are marching down your 205 degree heading when you hit their 109
degree sighting.
At that point, whichever way you choose, you should see landmark 1
now at 25 degrees and landmark 2 at 289. Now start searching.
One small caveat: if the landmarks are metal, like flagpoles, step a
few feet away from them before shooting any compass readings. A duh
that I sometimes forget.
Thinking about writing clues with mils,
Sir Balthazar
Back Azimuth Compass Readings Was:...use of declination
4 messages in this thread |
Started on 2004-06-30
Back Azimuth Compass Readings Was:...use of declination
From: Sir Balthazar (neovolatile@yahoo.com) |
Date: 2004-06-30 17:28:33 UTC
Re: [LbNA] Back Azimuth Compass Readings Was:...use of declination
From: dave & diane (vonderinsel@cox.net) |
Date: 2004-06-30 14:09:51 UTC-04:00
Some also call that Resection with Extreme Prejudice. Not to be confused with 'intersection', where two folks are in different spots - Hey! That's a great idea!
Have Person 1 go to Landmark A and take a reading of, say, 45 degrees. Have Person 2 go to Landmark B and shoot an azimuth of 136 degrees. Where they intersect is the box. Teamwork!
(No use of mils - there's too many engineers and artillerists out here already!)
Dave
The von der Insels
P10 F206 X113 H8 E3
----- Original Message -----
From: Sir Balthazar
To: letterbox-usa@yahoogroups.com
Sent: Wednesday, June 30, 2004 1:28 PM
Subject: [LbNA] Back Azimuth Compass Readings Was:...use of declination
You know, I wish more folk would use a map; I truly do. Fact is I
think many letterboxers find even reading a compass a chore.
How many of you have planted or found a box using "Back Azimuth?"
JugglerMouse has one of her Redwall series that is found that way.
That will show ME for teaching her about Back Azimuth.
You still puzzled? Imagine if you will that the clues say that a box
sees landmark 1 at 25 degrees and sees landmark 2 at 289 degrees. How
would you find the box?
1. Go to Landmark 1
2. Add 180 degrees to the 25 degrees, that gives you the heading of
205 degress (SSW, right?)
3. Walk along that line until landmark 2 lines up with 289 degrees.
4. You should be standing on it!
or
Repeat steps one and two above
3. Have a friend go to landmark 2
4. 289 - 180 (because the azimuth is bigger than 180 degrees) to get
the heading of 109.
5. Have the friend sight along 109 degrees and yell STOP at you while
you are marching down your 205 degree heading when you hit their 109
degree sighting.
At that point, whichever way you choose, you should see landmark 1
now at 25 degrees and landmark 2 at 289. Now start searching.
One small caveat: if the landmarks are metal, like flagpoles, step a
few feet away from them before shooting any compass readings. A duh
that I sometimes forget.
Thinking about writing clues with mils,
Sir Balthazar
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[Non-text portions of this message have been removed]
Have Person 1 go to Landmark A and take a reading of, say, 45 degrees. Have Person 2 go to Landmark B and shoot an azimuth of 136 degrees. Where they intersect is the box. Teamwork!
(No use of mils - there's too many engineers and artillerists out here already!)
Dave
The von der Insels
P10 F206 X113 H8 E3
----- Original Message -----
From: Sir Balthazar
To: letterbox-usa@yahoogroups.com
Sent: Wednesday, June 30, 2004 1:28 PM
Subject: [LbNA] Back Azimuth Compass Readings Was:...use of declination
You know, I wish more folk would use a map; I truly do. Fact is I
think many letterboxers find even reading a compass a chore.
How many of you have planted or found a box using "Back Azimuth?"
JugglerMouse has one of her Redwall series that is found that way.
That will show ME for teaching her about Back Azimuth.
You still puzzled? Imagine if you will that the clues say that a box
sees landmark 1 at 25 degrees and sees landmark 2 at 289 degrees. How
would you find the box?
1. Go to Landmark 1
2. Add 180 degrees to the 25 degrees, that gives you the heading of
205 degress (SSW, right?)
3. Walk along that line until landmark 2 lines up with 289 degrees.
4. You should be standing on it!
or
Repeat steps one and two above
3. Have a friend go to landmark 2
4. 289 - 180 (because the azimuth is bigger than 180 degrees) to get
the heading of 109.
5. Have the friend sight along 109 degrees and yell STOP at you while
you are marching down your 205 degree heading when you hit their 109
degree sighting.
At that point, whichever way you choose, you should see landmark 1
now at 25 degrees and landmark 2 at 289. Now start searching.
One small caveat: if the landmarks are metal, like flagpoles, step a
few feet away from them before shooting any compass readings. A duh
that I sometimes forget.
Thinking about writing clues with mils,
Sir Balthazar
Yahoo! Groups Sponsor
ADVERTISEMENT
------------------------------------------------------------------------------
Yahoo! Groups Links
a.. To visit your group on the web, go to:
http://groups.yahoo.com/group/letterbox-usa/
b.. To unsubscribe from this group, send an email to:
letterbox-usa-unsubscribe@yahoogroups.com
c.. Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
[Non-text portions of this message have been removed]
Re: Back Azimuth Compass Readings Was:...use of declination
From: (r.labelle@verizon.net) |
Date: 2004-06-30 18:40:49 UTC
Yes, Sir B., I have a fondness for the use of "back azimuth" (learned
while in the U.S. Army) and have used it in a couple of placements.
Look at Sassafras Pond LB (Schuyler) NY, for instance. It's also
sometimes useful even where not mentioned. I recall using it at
Prayer Rock LB (VT) - my first find, with a companion, and also the
first one placed in the U.S., it's claimed.
Bob / 'Cock o' the Trail'
--- In letterbox-usa@yahoogroups.com, "Sir Balthazar"
wrote:
> How many of you have planted or found a box using "Back Azimuth?"
> JugglerMouse has one of her Redwall series that is found that way.
> That will show ME for teaching her about Back Azimuth.
>
> Sir Balthazar
while in the U.S. Army) and have used it in a couple of placements.
Look at Sassafras Pond LB (Schuyler) NY, for instance. It's also
sometimes useful even where not mentioned. I recall using it at
Prayer Rock LB (VT) - my first find, with a companion, and also the
first one placed in the U.S., it's claimed.
Bob / 'Cock o' the Trail'
--- In letterbox-usa@yahoogroups.com, "Sir Balthazar"
> How many of you have planted or found a box using "Back Azimuth?"
> JugglerMouse has one of her Redwall series that is found that way.
> That will show ME for teaching her about Back Azimuth.
>
> Sir Balthazar
Re: [LbNA] Back Azimuth Compass Readings Was:...use of declination
From: (californiabear@comcast.net) |
Date: 2004-06-30 18:59:40 UTC
Sir Balthazar wrote:
> You know, I wish more folk would use a map; I truly do. Fact is I
> think many letterboxers find even reading a compass a chore.
I always try to look at a map, preferably a topographic map, before going to look for a box in an area I don't know well. The map can be a good indicator of what kind of terrain to expect when you get there. I have also been able to follow the clues on a map and have a pretty good idea of where the box is before I get to it.
I purchased the National Geographic Topo! map program for California and
just finished marking the approximate location (or starting point if I couldn't determine the box's location) for all the letterboxes in LA and Orange Counties. This has proven to be very helpful in planning boxing trips as I can see all the boxes in a geographic area without having to stop and think if that letterbox in San Marino is near Pasadena or is somewhere in the San Fernando Valley.
> One small caveat: if the landmarks are metal, like flagpoles, step a
> ew feet away from them before shooting any compass readings. A duh
> that I sometimes forget.
Especially fire hydrants! Those iron monsters would have you walking in circles if you tried to follow the needle without looking up.
> Thinking about writing clues with mils,
How devious! Dang you for making us learn new things!! Don and Gwen did this to us with the Stamp Golf series in Long Beach! (Of course, who am I to talk since I am thinking about a series having to do with Astronomical Units [AU]). >:)
--
___________________________________
California Bear
> You know, I wish more folk would use a map; I truly do. Fact is I
> think many letterboxers find even reading a compass a chore.
I always try to look at a map, preferably a topographic map, before going to look for a box in an area I don't know well. The map can be a good indicator of what kind of terrain to expect when you get there. I have also been able to follow the clues on a map and have a pretty good idea of where the box is before I get to it.
I purchased the National Geographic Topo! map program for California and
just finished marking the approximate location (or starting point if I couldn't determine the box's location) for all the letterboxes in LA and Orange Counties. This has proven to be very helpful in planning boxing trips as I can see all the boxes in a geographic area without having to stop and think if that letterbox in San Marino is near Pasadena or is somewhere in the San Fernando Valley.
> One small caveat: if the landmarks are metal, like flagpoles, step a
> ew feet away from them before shooting any compass readings. A duh
> that I sometimes forget.
Especially fire hydrants! Those iron monsters would have you walking in circles if you tried to follow the needle without looking up.
> Thinking about writing clues with mils,
How devious! Dang you for making us learn new things!! Don and Gwen did this to us with the Stamp Golf series in Long Beach! (Of course, who am I to talk since I am thinking about a series having to do with Astronomical Units [AU]). >:)
--
___________________________________
California Bear