MSL 301
Rev. 15 Apr 2005
MSL 301, Lesson 3a: Land Navigation I
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Objectives
Become familiar with marginal information on a mapsheet
Identify topographic symbols on a military map
Identify the five major, three minor and two supplemental terrain features on a map
Determine grid coordinates on a map Measure straight-line and road distance on
a map
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MSL 301, Lesson 3a: Land Navigation I
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Marginal Information
Sheet Name
Sheet Number
Adjoining Map Sheets Diagram
Tenino
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Marginal Information Special Notes
Declination Diagram
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Marginal Information Scales
Contour Interval Notes
Grid Reference Box
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Marginal Information Unit Imprint
Legend
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Colors used on a Military Map Black: Man-made features
Blue: Water features
Brown: Relief features and elevation on older or red-light
readable maps
Green: Vegetation
Red: Man-made features
Red-Brown: Cultural features and non-surveyed spot
elevations
Other: Occasionally other colors may be used to show
special information and if used will be noted in the marginal
information.
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MSL 301, Lesson 3a: Land Navigation I
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Topographic Symbols: Black
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Topographic Symbols: Red
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Topographic Symbols: Blue
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Topographic Symbols: Green
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Topographic Symbols: Brown Contour Lines
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Terrain Features
Five Major Ridge Hill Saddle Valley Depression
Three Minor Draw Spur Cliff
Two Supplemental Cut Fill
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Uniform, Gentle Slope
Insert figure 10-6
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Convex Slope
Insert figure 10-6
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Contour lines around a slope
Insert figure 10-6
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Measuring horizontal distance
Insert figure 10-6
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Percentage of Slope in meters
Insert figure 10-6
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Degree of Slope
Insert figure 10-6
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Gradient Slope
Insert figure 10-6
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Protractor(GTA 5-2-12, 1981)
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Determining Grid Coordinates Select the correct scale on the protractor. Place the horizontal scale on the grid line
with the “0 mark” at the lower left-hand corner of the grid square.
Slide scale right into until the vertical scale intersects the center of your plot point.
Read right then read up
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MSL 301, Lesson 3a: Land Navigation I
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Four-Digit Grid Coordinates
Read Right
The
n U
p
EH 78 00 1) Identify the 100, 000 Grid Square Identification Letters (in the Grid Reference Box).
2) Read Right to the last grid before your point.
3) Read Up to the last east-west grid below or before your point.
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MSL 301, Lesson 3a: Land Navigation I
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Place your protractor scale on the Zero-Mark( )
Zero “0” Mark
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Six-Digit Grid Coordinates
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Eight-Digit Grid Coordinates
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Ten-Digit Grid Coordinates
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Graphic Scale
Statute Miles
Kilometers
Nautical Miles
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Straight Line Distance
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Conclusion
Become familiar with marginal information on a mapsheet
Identify topographic symbols on a military map
Identify the five major, three minor and two supplemental terrain features on a map
Determine grid coordinates on a map Measure straight-line and road distance on
a map
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