Using a compass to sight a bearing to a distant target.
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MN N 340 320 300 280 W 260 240 220 200 S 160 140 120 100 E 80 60 40 20 Using a compass to sight a bearing to a distant target. Measures an angle between Magnetic North, your location, and the distant target.
Transcript of Using a compass to sight a bearing to a distant target.
MN
N340
320
300
280
W260
240
220 200 S160
140
120100
E80
60
4020
Using a compass to sight a bearing to a distant target.
Measures an angle between Magnetic North, your location, and the distant target.
• Sight to the target with the compass. • Turn the ring to align
the orienting arrow with the red end of the magnetic needle.
• Read the bearing from the ring at the index line.
Using a compass to get a bearing to a distant target.
MN
N340
320
300
280
W260
240
220 200 S160
140
120100
E80
60
4020
Sighting with a Mirrored Compass
• Hold the compass level with the mirror at about a 45° angle.
• Use the sighting notch to align the compass with the target.
• Looking into the mirror, turn the dial to align the orienting arrow with the north needle.
Sighting with a Mirrored Compass
• Turn the dial to align the orienting arrow with the north arrow.
N
340
320
300
280
W260
240 220 200S
160140
120100E
80
604020
N
340
320300280W260
240
220
200
S
160
140 120 100E
80
6040
20
Needle ParallaxGood Bad
Keep the needle parallel to the orienting arrow.
Parallax Side View
Needle ParallaxView from Above View from Behind
N
340
320300280W260
240
220
200
S
160
140 120 100E
80
6040
20
340
320300280W260
297°
Sighting with a Mirrored Compass
• Read the bearing from the index line
Each increment is 2°!Longer tics every 10°!Labeled every 20° 296°
212°
36°
36°
254° 255°!?
Labeled every 10°!Longer tics every 5° !Each increment is 1°
Circle in a Circle!to !
“Box the Needle”
305°-306°
357°
357.5°
Sighting with a!Lensatic Style Compass
Labeled in !Degrees and Mils!(6400 mils = 360°)!!Degrees!Labeled every 20°!Tics every 5° !!Mils!Labeled every 200 mils!Long tics every 100 mils!Increment every 20 mils
1850 mils!104°
550 mils!31°
4640 mils!261°
5750 mils!323°
Sighting with a!Direct Sighting Style Compass
LensMirror
Floating Compass Card
Side View
54LU Compass
70
250
60
240
50
230
80
260
Forward bearings in!! large type!Back bearings in!! small type!!Labeled every 10°!Increases left-to-right!Longer tics every 5° !Each increment is 1°
226° 46°Forward bearing? Back bearing?
275.5° 95.5°Forward bearing? Back bearing?
Forward bearings in!! black type!Back bearings in!! red type!!Labeled every 10°!Increases right-to-left!Each increment is 1°
276° 96°Forward bearing? Back bearing?
