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Loosen the clamping nut underneath the sun compass
(b)
turn
and
the
line points
direction
which represents the azimuth
This
azimuth
direction line
has
some
This
tion line.
its
map
that
so
is parallel
the edge
The destination point
it
your
from
to
true north and the line
your position
The operator must
north.
(c)
Slide
the
outside
coincides
edge
represents today's date.
it
that
same so
the date bar and solar plate
clamping nut.
(d) The
shadow bar
intersection
of the proper time and
The latitude
The
is
time
taken
local apparent time.
The
compass
(e)
clamped.
Then the vehicle
center gnomon rod
the
is
now headed on
bar points
true north.
to
(f
As
the vehicle
)
should
reset to
be
—
the time being taken
utes
local apparent time.
If
the course lies nearly
the longitude
neys,
the local apparent time maintained
to
minutes correction
OPERATION
until
date bar
to the
is
determined
it
on
is accomplished
center point coincides
true north and south
to a
is
marked
position.
The
drawn
is
the azimuth
that
sure
be
solar plate along the date bar
with
the date line
Both
does not matter which
is
rotated
will
taken
be
from
the timepiece which
is
leveled
is
falls
on the shadow bar.
its
course and the arrow-head
proceeds
new time at regular
a
from
will
change enough to require
for
each degree
the arrow-head
mark
degree
of
course
the
to be
from
a map,
as
north
such
a
laying
by
a
with
the map and
on
clockwise angle formed
the destination
to
of
the desired course.
azimuth
the
the date bar which
on
sides of the date
edge
in
position
by
until it
latitude
from
map or instruments.
the
referring
to the level
by
until
turned
the shadow cast
along the course, the shadow bar
intervals
the timepiece maintained
or west, on long
east
the timepiece.
by
of
longitude)
IT
terminating
protractor
on the
followed.
providing it
arrow
or projec
protractor
on the
your position and
line
on the
map.
drawn
line
a
between
point from
NOTE
is
from
read
true
straight
until
the
bar
are the
is
Clamp
used.
turning
up on the
with
coincides
lines.
is
maintained
vial
and
The
vehicle
the date
on
min
of
15
fast jour
correction
a
to
added
be
the
:
the
on
by
on
(4
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