1. KNOW YOUR POSITION Fix it
with a mark on your chart, referring to a nearby
buoy or other navigation aid and mark your
position with a dot.
2. PLOT A COMPASS COURSE on your chart
from your position to your objective or turning
mark. See that it does not pass over places of
danger.
3. STEER THAT COURSE. correcting for
errors caused by wind, current, others.
THE GRIEF SAVER has two
disks. Read magnetic on top disk while bottom
disk grid is held parallel to latitude and
longitude lines.
SET MAGNETIC VARIATION by matching
(True
North) to degree scale and the amount and
direction of variation.
PLACE CENTER OF GRIEF SAVER on your
position marked on your chart (see 1 above) To
plot position, see below. If you have marked
your course on the chart. you can place center
of the GRIEF SAVER anywhere on the line.
ADJUST GRIEF SAVER, rotating so grid
lines are parallel to chart's lines of latitude
or longitude.
STRETCH THE STRING to your next
objective. Read magnetic course on the GRIEF
SAVER scale. If you penciled your course on the
chart, string may be ignored.
**TIPS: Chart's compass rose tells
variation. Hold Grief Saver over it to check
setup. Lock in your variation with a small piece
of tape on the edge of Grief Saver if remaining
in the area. Outer degree scale best for long
courses. Inner one for maneuvering in closer
quarters.
TO PLOT YOUR POSITION Check that Grief
Saver is set for variation. Note compass
bearings of navigation aid (buoy, lighthouse,
edge of land or other charted position). Place
outside edge of Grief Saver with bearing degree
on that navaid. Adjust the grid to latitude or
longitude lines as above. Mark pencil dot
through the center and connect with a pencil
line to the navaid. This is your line of
position. Repeat to another navaid, preferably
close to right angles to the first, crossing it
for a fixed position.
ERRORS may be compensated with a
course adjustment. For current, see government
publications. For wind, develop your own boat's
experience.
DEVIATION is the boat's built-in error
and can be determined by comparing the Grief
Saver's magnetic course with the boat's compass
reading to that mark. The difference is the
deviation. A professional compass adjuster may
be employed to correct the compass, or allowance
may be made on the various courses. more can be
written her, but as in all of the above
material, it is designed to get the prospective
pilot started.
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