compass - Monaro RFS

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Map Reading & GPS
A guide for Firefighters
NSW Rural Fire Service – Monaro Team
Version 3.1
Part Two - Compass
Map Reading & GPS
Part Two - Compass
A guide for Firefighters
NSW Rural Fire Service – Monaro Team
1. The Points of a Compass
N
NW
NT
NNW
NNE
WNW
NE
ENE
E
W
WA
SA
ESE
WSW
SW
SE
SSW
SSE
S
Map Reading & GPS
Part Two - Compass
A guide for Firefighters
NSW Rural Fire Service – Monaro Team
2. The Degree System
360°
0°
N
45°
315°
NW
NNW
NNE
WNW
270°
NE
ENE
E
W
ESE
WSW
SW
SE
SSW
SSE
135°
225°
S
180°
90°
Map Reading & GPS
Part Two - Compass
A guide for Firefighters
NSW Rural Fire Service – Monaro Team
3. Bearings
30°
Map Reading & GPS
A guide for Firefighters
NSW Rural Fire Service – Monaro Team
3. Bearings
225°
Part Two - Compass
Map Reading & GPS
A guide for Firefighters
NSW Rural Fire Service – Monaro Team
3. Bearings
Smoke has been sighted from
the Burnima Road and Monaro
Highway intersection at a
bearing of approximately 6
Part Two - Compass
Map Reading & GPS
A guide for Firefighters
NSW Rural Fire Service – Monaro Team
3. Bearings
The smoke can be seen from
“Toorallie” looking to the SW
Part Two - Compass
Map Reading & GPS
A guide for Firefighters
NSW Rural Fire Service – Monaro Team
3. Bearings
A firefighter from the Cathcart
Brigade has driven up to the
top of Lighthouse Hill, he has
a compass and can see the
smoke due west
Part Two - Compass
Map Reading & GPS
A guide for Firefighters
NSW Rural Fire Service – Monaro Team
3. Bearings
That narrows it down a bit....
Activity 9:
Complete
the bearings
exercise
sheet
Part Two - Compass
Map Reading & GPS
A guide for Firefighters
NSW Rural Fire Service – Monaro Team
4. True North, Magnetic North and Grid North
Part Two - Compass
Map Reading & GPS
Part Two - Compass
A guide for Firefighters
NSW Rural Fire Service – Monaro Team
4. True North, Magnetic North and Grid North
36
35
GN
TN
GN
TN MN
GRID
CONVERGENCE
1.5
GRID / MAGNETIC
ANGLE
13.3
GRID
CONVERGENCE
1.6
MN
GRID / MAGNETIC
ANGLE
9.9
34
75
76
77 23
24
Shooters Hill & Kanangra (showing grid variation)
25
Map Reading & GPS
A guide for Firefighters
NSW Rural Fire Service – Monaro Team
Part Two - Compass
Magnetic variation around the globe
Map Reading & GPS
A guide for Firefighters
NSW Rural Fire Service – Monaro Team
Part Two - Compass
Magnetic variation around Australia
1. True North, Magnetic North and Grid North
Map Reading & GPS
Part Two - Compass
A guide for Firefighters
NSW Rural Fire Service – Monaro Team
Grid North
True North
Magnetic North
Map Reading & GPS
A guide for Firefighters
NSW Rural Fire Service – Monaro Team
5. Magnetic Variation (add or subtract?)
Part Two - Compass
Map Reading & GPS
A guide for Firefighters
NSW Rural Fire Service – Monaro Team
6. Map Setting
a)
b)
c)
d)
e)
Compass set to north
Place edge of compass
along the edge of the map
border (True North)
Rotate graduated dial so
that the orienting lines are
parallel with grid lines
(Grid North)
Rotate the map and
compass until the needle
is east or west of Grid
North as per the north
points diagram
All of these lines should
look like the
representation that is
provided in the north
points diagram
Part Two - Compass
GN
TN
MN
Map Reading & GPS
A guide for Firefighters
NSW Rural Fire Service – Monaro Team
6. Map Setting
Part Two - Compass
GN
TN
MN
Map Reading & GPS
Part Two - Compass
GN
A guide for Firefighters
TN
NSW Rural Fire Service – Monaro Team
6. Map Setting
GN
TN
MN
MN
Map Reading & GPS
A guide for Firefighters
NSW Rural Fire Service – Monaro Team
Part Two - Compass
Any Questions?
Outdoor Activity:
Complete map setting, grid and magnetic bearing activities.
Fox Hunting
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