uop2

Invitation:

Standards:

Determine magnetic azimuths using a lensatic compass within a plus or minus of 3 degrees
Convert magnetic azimuths to grid azimuths with zero degree of error
Convert grid azimuths to back azimuths with zero degree of error
Plot and draw back azimuths on a topographical map with a plus or minus of 3 degrees
Determine their location on a topographical within 300 meters

Prerequisites:

ability to identify major objects on a topographical map and correlate them to the actual objects
use a protractor to plot azimuths on a topographical map

Tasks (What the student is to do):

Using the lensatic compass the student will be able to measure an azimuth to a distant point with a plus or minus of 3 degrees
Using pencil and paper the student will be able to convert a magnetic to a grid azimuth
Using a pencil and paper the student will be able to compute a back azimuth
Using a protractor students will plot back azimuths on a topographical map
Students will be able to determine their location on a topographical within 300 meters

Interactions:

The instructor introduces the steps to determine azimuth to distant locations
The instructor informs and models how to convert a magnetic azimuth to a grid azimuth
The instructor informs and models how to determine back azimuths
Students work in pairs
Students use the lensatic compass to determine the azimuth of two distant locations
Student pairs convert the magnetic azimuths to grid azimuths
Students covert magnetic azimuths to back azimuths
Students plot the two back azimuths on the topographical map from the known distant location
Students determine their location on a topographical map plus or minus 50 meters

Situation:

Lesson one - In a classroom, or outside environment, instructor teaches students how to measure azimuths using lensatic compass
Lesson two - In a classroom, or outside environment, instructor teaches students how to convert magnetic to grid azimuths
Lesson three - In a classroom, or outside environment, instructor teaches students how to convert magnetic azimuths to back azimuths
Lesson four - In a classroom, or outdoor environment, instructor teaches students how to plot azimuths on a topographical map and identify their location
Student Activity one - In an outdoor environment, instructor supervises students working in pairs determining the azimuths to 5 known points
Student Activity two - In a indoor or outdoor environment, instructor supervises students working in pairs determining the conversion of 16 magnetic azimuths grid azimuths
Student Activity three - In a indoor or outdoor environment, instructor supervises students working in pairs determining the conversion of 10 grid azimuths to back azimuths
Student Activity four - In an outdoor environment, instructor supervises students working in pairs plotting back azimuths and identifying their location

Assessment (How students will be graded):

Student Activity one - 'go' or 'no go' pairs must determine 4 of 5 azimuths within a plus or minus of 3 degrees
Student Activity two - 'go' or 'no go' pairs must determine conversion of 16 magnetic go grid azimuths with no margin for error
Student Activity three - 'go' or 'no go' pairs must determine conversion of 10 grid azimuths to back azimuths with no margin for error
Student Activity four - 'go' or 'no go' pairs must plot two back azimuths and determine their location within 300 meters
All 'no-go' pairs will be retrained and tested on the spot or as soon as possible

Tools (Materials needed for students to complete project):

Lensatic compass (one for each pair of students)
Protractor (one for each student)
Topographical map of location for Student Activity four (one for each pair of students)
Paper for computing back azimuths
Sharp pencil (.05 lead) for plotting azimuths
Classroom with overhead projector
Outside area with 10 known points (identifiable on a map and over 1000 meters from working area)

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