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A
spare level
pass.
of
breakage.
Protractor
c.
plate fastened to the gimbal mounting and marked
round
steel
in
off
one degree
arranged
to be
degree
the
180
parallel
must
be
arrowhead pointing
in
setting the azimuth
used
determining in whiqh direction the vehicle
Bar.
Date
d.
(1) The date bar (item 4)
pivot bolt.
center
on the
date bar.
the
arrowhead
by
operation, the
instrument
have
There are
(2)
which represent the
These date lines indicate
of
solar
the
edges
plate in
between
This
setting compensates
rays ip the earth, as the
day.
to
Along
the outer
(3)
These numbers represent the equation of time or
of numbers.
amount of time
the
solar time (the time at
the
mean
DESCRIPTION
is
provided
—
The protractor
Plate.
intervals
numbered every
in
read
counter-clockwise
a
degree
to
0
to the center-line
in
direction
the
of
The
The date bar has
which the azimuth is
arrow
points true north
correctly
been
of
date lines engraved on the date bar,
series
a
10th, 20th,
the
Adjustment of
plate.
the lines
can be made
for
altitude of
—
FIOUBE
2
edges
in
minutes
with
each
plate
direction.
of
the
diameter
of
the vehicle,
of
travel. The
pre-determined course, or
a
is
is
flat
a
steel
solar plate can
center line terminating
a
set on
if
made.
last
day
and
proper position
the
for
the changing angle
the sun changes
The Date Bar.
of the date bar, there are
added or subtracted
to be
that instant
3
in
instrument
(item
3)
and
ten degrees,
A
line
protractor
plate
with
protractor is
traveling.
bar mounted at
along
be moved
in
the protractor.
all
settings on the
of
month.
each
for
the outside
of
the solar
edge
intermediate
dates.
of
the sun's
from
series
a
the time
on
case
is
a
so
on
the
for
its
an
In
day
from
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