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Abrams SC-1 Technical Manual page 15

Sun compass

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(7) Mark
off
the center line of the vehicle
point A.
Stretch
(8)
a
(point
B).
pass
Turn
the compass
(9)
"0"
mark
degree
string
is tight and not
Insert
the second
(10)
alignment.
Kecheck
the
After
the
(11)
mounting bracket, using
on the
This
as
guide.
a
reinstallation,
in
compass
(12) When not in
ing
provided.
case
disassembled
to
INSTALLATION
C-B
distance
the
string
from point
until
protractor.
on the
thrown
out
bolt and tighten
CENTtft-UNE-OE
Mounting Diagram.
FIGURE
4
compass is completely aligned, mark
will
mark
be used
if
it
the sun compass
use,
Only
gnomon and sighting rods
the
place
compass in
the
D
at point
(line C-D).
A
center
to the
string is directly
the
CAUTIpN
of line
any object.
by
them
,
of
one edge
the
as
guide
a
should
removed.
be
is
stored in
the case.
perpendiculur
to
This
determines
of
the com
over
the
Be sure the
:
both securely.
D
line
a
lower support
realign
to
the
carry
a
need be

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