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Finding the
Distance
Check the scale on your chart. If it is 40,000 to 1,
80,000 to 1 or 160,000 to 1, we can then use the
scale that is on the side of the Charting Pal. In
this way by measuring our course line we can
determine our distance.
If the scale of your chart is not a multiple of
40,000 to 1, we can still accurately compute our
distance.
Using the millimeter
ruler on the side of the Charting Pal you can
measure your course line. Then it is a simple matter
to read your distance from the Latitude Scale on the
side of your chart.
Each gradation on the side of your chart is equal to
one minute. This is further broken down into tenths
and on most charts we can guesstimate another tenth.
This would make our distance measurement accurate to
one hundredth of a mile or 60 feet.
Once you have this number, write it under the course
line with the letter “D” after the number. This way
it will not be confused with the course heading.
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