1. Tenino Map Practical Application
1. Recognize Terrain Features
2. Measure Distance (Straight Line & Road)
3. Read Grid Coordinates
4. Determine Elevation
5. Convert Magnetic Azimuth
6. Find Unknown Location by Resection

2. Back Azimuth = Add or Subtract 180 Note Map Number
Note Grid Lines
(Read Right and up)
Read up = 78
Note Meter Scale
Note Miles Scale
Read Right = 15
Note Contour Interval
Note G-M Angle
Back Azimuth = Add or Subtract 180
Note Map Number

3. Practical Exercise #1 1. Recognize Terrain Feature (Hill Top) 2
Practical Exercise # Recognize Terrain Feature (Hill Top) Identify Grid Square
Look at the lower left hand corner of your map, and locate Hill Top 192.
What grid square is Hill Top 192 located in?

4. Answer How many of you had: EG0279 ?
(If you forgot the “EG”, your answer is incorrect.)

5. Determine Eight-Digit Grid Coordinates (Note Position of Protractor)

6. Practical Exercise # 2 Find Eight-Digit Grid Coordinates
What are the Eight Digit Grid Coordinates for Hill Top 192?

7. Answer
How many of you came up with EG ?

8. Practical Exercise #3 Identify Terrain Feature
What natural terrain feature is at grid coordinate EG ?

9. Answer
Depression

10. Practical Exercise #4 Identify Terrain Feature
Locate north/south grid line 15 at the bottom of your map.
Follow it up six grid squares.
What man-made Terrain Feature do you see in this grid square? (Remember: Read Right & Up)

11. Answer
How many have “Mine or Quarry”?

12. Practical Exercise #5 Determine Eight-Digit Grid Coordinates
What are the eight-digit grid coordinates of the mine or quarry you have just located?

13. Answer
How many have EG ?

14. Measure Straight-line Distance
Match tick marks on paper
strip against map scale.

15. Practical Exercise #6 Measure Straight-line Distance in Meters
What is the straight-line distance in meters between the water tower in grid square EG and the oil tank in grid square EG ?

16. Answer
How many have 8,630 meters?
(+/- 100 Meters)

17. Practical Exercise #7 Measure Straight Line Distance in Miles
What is the distance in miles between those same two points?
(Use “Statute” Miles Scale, not “Nautical” Miles Scale)

18. Answer
5.4 Statute Miles (+/- .10 miles)

19. Measuring Curved Line Distance (As with Roads)
Move and change angle of paper strip, as you move along road.

20. Practical Exercise #8 Measure Road Distance
What is the road distance in meters between the river bridge in grid square EG , southwest to the road junction in grid square EG , at the Church of God?

21. Answer
8,000 meters (+/- 100 meters)

22. Determine Elevation Locate point on the map
Determine contour interval of map
Locate index contour line nearest point
Count number of contour lines up or down that must be crossed to get to point
Points at top of hill add half the contour interval
Points at bottom of depression subtract half the contour interval

23. Practical Exercise #9 1. Recognize Natural Terrain Feature 2
Practical Exercise #9 1. Recognize Natural Terrain Feature 2. Determine Elevation
What type of natural terrain feature is at grid coordinate EG ? (Look closely, before identifying)
What is its height in meters?

24. Answers Saddle 150 meters (+/- 10 meters)
(Did you remember what the contour interval is on the Tenino Map?)

25. Practical Exercise #10 1. Recognize a Natural Terrain Feature 2
Practical Exercise #10 1. Recognize a Natural Terrain Feature 2. Determine Elevation
What natural feature is found at grid coordinate EG
What is its elevation in meters?

26. Answers
Hill Top
310 Meters

27. Convert Magnetic Azimuth
Check Here on Your Tenino Map for GM Angle Instructions

28. Practical Exercise #11 1. Convert Magnetic Azimuth 2
Practical Exercise #11 1. Convert Magnetic Azimuth 2. Determine Eight-Digit Grid Coordinates 3. Measure Straight line distance 4. Recognize Manmade Feature
An observer at the Crawford Mountain Lookout Tower, in grid square EG1887 sees a convoy parked on a light duty road. The magnetic azimuth from his position to the convoy is 260 degrees, a distance of 15,820 meters. What is the eight-digit coordinate of the convoy.

29. Answer EG02509065 (+/- 50 meters) (+50 meters = EG02559070)

30. Practical Exercise #12 1. Convert Magnetic Azimuth 2
Practical Exercise # Convert Magnetic Azimuth Find Unknown Location.
You are at the church of God in grid square EG0385 and observe an automobile accident on Interstate 5. The magnetic azimuth from your position to the cars is 331 degrees. What is the eight-digit coordinate of the accident?

31. Answer EG02329010 (+/- 50 meters) (+ 50 meters = EG23379015)

32. Determine Unknown Location on Ground by Resection
Step 1: Identify Two Or Three Distant Locations on the Ground and Mark them on the Map
Step 2: Shoot a Magnetic Azimuth to the Distant Locations
Step 3: Convert the Magnetic Azimuths to Grid Azimuths
Step 4: Compute the Back Azimuths
Remember:
a. If Converted Grid Azimuth is less than 180 , add 180 .
b. If Converted Grid Azimuth is more than 180, subtract 180

33. Practical Exercise #13 1. Locate Unknown Point on Ground by Resection
You are trying to determine your unknown location. You determine the magnetic azimuth to TV relay tower in grid square EG1287 to be 204 degrees and the magnetic azimuth to Crawford Mountain Lookout Tower in grid square EG1887 to be 129 degrees. What is your location to the nearest 50 meters?

34. Answer EG15859120 (+/- 50 meters) + 50 meters = EG15909125
(Did you remember to first add the G-M Angle, and then subtract or add 180 degrees?)

35. Practical Exercise #14 1. Identify Manmade Feature 2
Practical Exercise # Identify Manmade Feature Convert Magnetic Azimuth Measure Straight Line Distance Determine Grid Coordinates
What manmade feature is on a magnetic azimuth of 119 degrees at a distance of 5,700 meters from bench mark 86 in grid square EG0589?

36. Answer
Water tank (EG )

37. QUESTIONS?