Navigation.
1. Place compass on map with edge along desired line of travel. Make sure
Direction of Travel arrow points
towards your destination.
2. Rotate capsule until ”N” on graduation ring point towards North on the
map. Check compass housing
North/South lines are parallel to map meridians.
3. Hold compass horizontally in front of you. Turn yourself until red end of
the needle points towards ”N”
on the compass graduation ring. (Red end of needle will now be aligned to
red North arrow in bottom of
the compass capsule). Direction of Travel arrow now points precisely to
your destination. Look up, sight on a
land-mark and walk to it. Repeat this procedure until you reach your
destination.
4. When using a sighting compass with a mirror, hold compass as per
picture so that you can check direction
by looking at compass housing in the mirror while sighting in correct
direction of travel.
Direction of Travel arrow points
towards your destination.
2. Rotate capsule until ”N” on graduation ring point towards North on the
map. Check compass housing
North/South lines are parallel to map meridians.
3. Hold compass horizontally in front of you. Turn yourself until red end of
the needle points towards ”N”
on the compass graduation ring. (Red end of needle will now be aligned to
red North arrow in bottom of
the compass capsule). Direction of Travel arrow now points precisely to
your destination. Look up, sight on a
land-mark and walk to it. Repeat this procedure until you reach your
destination.
4. When using a sighting compass with a mirror, hold compass as per
picture so that you can check direction
by looking at compass housing in the mirror while sighting in correct
direction of travel.
This article is taken from Silva, it's very simple and easy to use. So bring
out your compass, buy a topographic map, then practice a little. Always
start in an area you know well, then when you understand the link between
the map and compass, it's time to get out in unknown land.
out your compass, buy a topographic map, then practice a little. Always
start in an area you know well, then when you understand the link between
the map and compass, it's time to get out in unknown land.
SILVA 1 - 2 - 3 SYSTEM©
1 2
3 4
Magnetic declination and how to compensate for it
The difference, between Geographic North (North/South map meridians)
and Magnetic North (towards
which red end of the compass needle points), is called declination. The
amount and direction of declination is
shown on the map. For ex. 20 degs. For Easterly declination, adjust as
follows:
The difference, between Geographic North (North/South map meridians)
and Magnetic North (towards
which red end of the compass needle points), is called declination. The
amount and direction of declination is
shown on the map. For ex. 20 degs. For Easterly declination, adjust as
follows:
With the declination scale inside the capsule
(Field 7 Ranger 3 etc.) turn yourself until red
end of the compass needle points to 20 degs.
on the ”E. decl. scale – now the direction of
travel arrow points in the correct direction.
(Field 7 Ranger 3 etc.) turn yourself until red
end of the compass needle points to 20 degs.
on the ”E. decl. scale – now the direction of
travel arrow points in the correct direction.
With compasses that have a declination
adjuster, (Voyager 9020, 8010 and 8040 etc)
you simply hold the graduation ring and turn
the compass capsule until the red end of the
North arrow points towards 20 degs. on the
Eastern side of the declination scale. When
this is done the compass will automatically
adjust the bearing. Remember though, to use
the North/South lines on the graduation ring as
map North reference lines when taking the
bearing on the map.
adjuster, (Voyager 9020, 8010 and 8040 etc)
you simply hold the graduation ring and turn
the compass capsule until the red end of the
North arrow points towards 20 degs. on the
Eastern side of the declination scale. When
this is done the compass will automatically
adjust the bearing. Remember though, to use
the North/South lines on the graduation ring as
map North reference lines when taking the
bearing on the map.
NB!
• Always check the functionality of the compass before using it in the field.
• Never expose compasses to extreme temperatures (above + 60°C or below
-40°C), or to magnetic fields
such as knives, radio speakers, magnets etc. Such exposure can cause
permanent damage to them.
• Always check the functionality of the compass before using it in the field.
• Never expose compasses to extreme temperatures (above + 60°C or below
-40°C), or to magnetic fields
such as knives, radio speakers, magnets etc. Such exposure can cause
permanent damage to them.
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