SAR Fundamentals/Navigation instruments theory

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1 Material covered
2 Time alloted
3 Compass
- 3.1 Student Questions
4 GPS
- 4.1 WAAS
5 Aids

Material covered

SAR Fundamentals Ch.13 "Navigation"

Basic SAR Skills Manual: Ch.7 "Navigation"

stride count

Time alloted

1.5hr - 09:30 - 11:30

Compass

Features to look for in compass:

straight edge
ruler (scale)
barrel in degrees
roamer
sighting mirror
declination
clinometer
needle zones

Good compasses:

SUUNTU MC-2G
Silva Ranger
approx $70

Declination: http://geomag.nrcan.gc.ca/apps/mdcal-eng.php

2012-01 Pincher Creek, 14deg 38' E

Student Questions

How does global compass work at any latitude?

From http://www.mapworld.co.nz/global.html

In the global compass, this problem has been solved with a structural innovation. The needle and magnet are built as separate units functioning independently from each other, so that the inclination of the magnetic field cannot tilt the needle. The needle can no longer move vertically. It is the compass magnet, separated from the needle, which absorbs the vertical force of the magnetic field. The needle itself is fixed at the lid by means of a double jeweled bearing. The magnet rotates with its jewel bearing on a pin. Such a compass works reliably in all zones of the world. Due to the strong magnet, the needle settles very quickly and stops immediately at the right position, allowing for an extremely accurate reading.

GPS

GPS component covers up to 1:13 of the attached lesson plan
- Waypoints are not an essential skill for using GPS. Students should be recording locations on paper, and should be able to estimate relative direction and distance to a new location.
  - This material can be covered in additional material presented by a SAR group outside the SAR Fundamentals course.

Image:GPS-lesson-plan.odt (pdf)