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## [TRLog] Reciprocal Bearings

 Subject: [TRLog] Reciprocal Bearings cfullgraf@sprynet.com (Chuck Fullgraf) Mon, 15 Apr 2002 15:54:09 -0400
 ```Here's a tip to easily calculate the reciprocal bearing for a beam = headings. Mentally adding or subtracting 180 can be difficult under = adverse conditions. If the bearing is less than 180 degrees, add 200 then subtract 20. Easy = math. Conversely, if the bearing is greater than 180 degrees, subtract 200 and = add 20. Another tidbit, if you deal with bearings divisible by ten, the sum of = the "tens" plus the "hundreds" will be the same as the sum for the = reciprocal. Example, for 50 degrees (or 050, if your a purest), the = reciprocal is 230 degrees. 0 + 5 =3D 5 and 2 + 3 =3D 5. It makes a good = check of your math. I learned these from my flying days when sometimes just keeping the = wings level commanded lots of metal resoures. Chuck, KE4OAR --- StripMime Report -- processed MIME parts --- multipart/alternative text/plain (text body -- kept) text/html --- ```
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