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Abrams SC-1 Technical Manual page 12

Sun compass

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according to the indicated
meridian)
obtain apparent or true sun time.
opposite
one end
date lines which
is
applied.
Intermediate
within
the length
January,
and
cember
opposite
appropriate
the
year
however, the equation
1943;
few
more than
a
Solar Plate.
e.
plate mounted
its
marked on
of latitude starting
degree
north
and south
to the
of
by a
series
sun time)
(true
The
vals.
order
and south latitudes.
shadow bar
the
MAINTENANCE MANUAL
heavy line.
of
a
represent the date to which
values are obtained by adjustment
of
the line.
the equation factors are given separately
date.
from
seconds
The
solar plate (item
it will
that
so
surface
series
a
at the equator and
latitude
45th
hyperbolas which represent local apparent time
from
m.
6 a.
of
the hour numbers
The
solar plate indicates
for
any given time-latitude
FIOUBE
The Solar Plate.
3
plus
sign,
Each
number
The
lines are opposite the
For
part
of the months
a
The date bar
factors
of
time
year
year.
to
5)
slide on the date bar.
of
elipses,
one
lines.
quarter hour inter
to
p. m. by
6
is
reversed
setting.
4
or minus,
is
directly
the correction
of
De
for
is
made
do not vary
is
an oval-shaped
It
has
for
third
each
running
way
each
These are crossed
in
the north
where to
to
the
set

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