- Board question
What are the three types of contour lines?
Index contours, which are heavier and carry the elevation number; intermediate contours, the lighter lines between index contours that are not numbered; and supplementary contours, dashed lines that show detail at half the contour interval.
- TC 3-25.26Publication
Map Reading and Land Navigation
TC 3-25.26 is the Army's map reading and land navigation manual: grids, marginal information, terrain features, azimuths, and navigation techniques. Dated November 2013, it is still the active reference used on land navigation courses and at boards. Note the designator -- it is a TC, not an FM or ATP.
- Board question
What do the standard colors on a military map represent?
Black shows man-made features. Blue shows water. Green shows vegetation. Brown shows relief features such as contour lines. Red classifies main roads and built-up areas. Red-brown replaces both red and brown on maps printed for red-light reading.
- Board question
What is the difference between a draw and a spur?
A draw is a less developed stream course where the ground slopes upward on three sides and downward in one direction; water drains through it. A spur is a short, sloping line of higher ground extending out from the side of a ridge; water drains away from it on both sides. On a map the contour lines of a draw point toward high ground and those of a spur point away from it.