SAR Fundamentals/Navigation instruments theory

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Parts of a compass which can be used on a map
Parts of a compass which can be used on a map
* straight edge
* straight edge
 +
* ruler
* rotatable bezel and interior north-south lines
* rotatable bezel and interior north-south lines
* roamer
* roamer

Revision as of 22:09, 29 December 2012

This page is based on the Lesson plan template.

Use that template to make similar pages.

Contents

Subject

What is this lesson plan about?

This lesson gives the students a theoretical (class room) understanding of the instruments that they may be using in the field to aid navigation.

The instruments covered are:

  • compass
  • GPS
  • altimeter
  • stride tally counter

For each instrument, the theory of how it operates is discussed along with how to select an instrument for purchase.

Only basic use of a GPS is shown. Advanced features such as waypoints, tracks and maps are left to another lesson beyond the SAR Fundamentals course.

Authors

List who wrote this lesson plan.

  • Brett Wuth

Scope

What is included in this lesson, what's not and why.

SAR Fundamentals Ch.13 "Navigation"
Basic SAR Skills Manual: Ch.7 "Navigation"
stride count

Prerequisites

What should students already know/have accomplished before the lesson is presented.

Prior to this lesson, students should have already been introduced to the following concepts:

  • direction measured in degrees
  • directions measured from True North (this lesson will introduce declination and magnetic north)

Parts of a compass which can be used on a map

  • straight edge
  • ruler
  • rotatable bezel and interior north-south lines
  • roamer
  • magnifying lens

Specifying a location in UTM

  • the three components of a UTM: Zone, Easting, Northing
  • map datums: NAD27 vs WGS84
  • the 6 digit short form of UTM

elevation

  • contour lines

Objectives

At the conclusion of this lesson the participants:

  1. will be able to ...

Time Plan

Total Time: 90 minutes


Time Material


00:00

3 min

Introduce topic title

Introduce Instructor

Present Objectives

00:03


instructional points in normal font

aids, exercises, activities in italic



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



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)



WAAS

Altitude/Azimuth calculator for WAAS geosynchronous satellites




Aids

What materials are needed or useful in presenting this lesson.

  • compasses for students
  • 5 Pincher SAR Garmin eTrex GPS's
  • 1 Brett Wuth's Garmin eTrex GPS
  • 5 copies topo map of locale (82 H/5)
  • copy for each student of local street map
  • copy for each student of PCSAR Doc-69 GPS - Set-Up and Maintenance
  • copy for each student of outside exercise sheet, adapted to locale
  • Radios

Question bank

List of questions suitable for an review/exam of this section.

Question bank

Frequently Asked Questions

What are some of the questions that students typically ask. Include the answers.


  • 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.

Feedback

When has this lesson been presented. What was the feedback.


License

What can others do with this lesson?


Recommended license below. Fill in the year and the author's name(s):

Copyright © YEAR, Author. This work is licensed under a Creative Commons Attribution-NonCommercial 2.5 Canada License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc/2.5/ca/ or send a letter to Creative Commons, 559 Nathan Abbott Way, Stanford, California 94305, USA.

Reference Material

If you need to cite sources, do so here.


[1]

Notes

Any additional notes, etc.

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