Quadrant
Mils
90
1600
90
270
360 Azimuth
Reverse |
Reciprocal
CAUTION
Some users who suffer from an eye condition called heterophoria (misalignment
of the eye axis) may get incorrect bearing when reading the compass with both
eyes. This can be checked as follows: take a bearing to an object with both eyes
open. Then close the eye not sighting through the compass. If the bearing does
not shift or change dramatically, there is no heterophoria and bearings can be taken
with both eyes open.
FIGURE 1
PLOTTING LOCATION
Aim at two fixed landmarks that likewise are distinguishable on a
map/chart for example the lighthouse at direction 20° and
landmark at 330° (as pictured in figure 2). Then draw straight lines
along the reverse bearings of 20° and 330° (200° and 150°) from
the lighthouse and the landmark on the chart. The intersection
point of these lines indicates your location. Your distance from
above mentioned fixed points can be determined either from
measuring on the chart or with trigonometric calculations.
FIGURE 2
N
E
W
S
180
190
200
170
150
140
130
210
220
230
240
250
270
280
290
300
310
320
0
350
340
330
10
20
30
40
50
60
70
80
90
120
100
110
160
MADE IN USA
DEGREES-360/R/QUADS/MILS
NW
NE
NW
NW
NW
NE
NE
NE
NW
NE
NE
NE
SE
SE
NE
NE
SE
SE
SE
NW
NW
SE
SE
SE
SE
sw
sw
sw
sw
sw
sw
sw
sw
NW
NW
sw
NW
NE
SW
SE
260
B R U N T O N
