supplemented by additional reports about various aspects of the terrain (as specified by
ordering headquarters).
A deliberate route reconnaissance is performed when enough time and qualified personnel
are available. It provides the necessary data for a thorough analysis and classification of
significant terrain features along a route. Information about repair or demolition
procedures is also reported. An overlay is used to show the exact location of each
reconnoitered terrain feature. DA reconnaissance report forms are included with an overlay
to establish a permanent record and to ensure that enough detail concerning important
route characteristics is included.
PART A SLOPES AND CURVES
Two land features that can present obstructions to military traffic are slopes and curves.
Engineers must be able to report the correct information about these features.
1-1. Slopes. Slopes are usually referred to as steep or gentle, but these terms are too
general for reconnaissance purposes. The slope of the ground seriously affects the speed at
which vehicles or personnel can move. A more exact way to describe slope is needed to
indicate the effect a given slope will have on traffic flow. All vehicles have limitations as to
the steepness of slope that can be negotiated. Most vehicles that must negotiate a slope of
7 percent or greater for any significant distance will be slowed. Any slope that is 7 percent
or greater is an obstruction. STANAG 2253 requires proper recording of any slope that is
5 percent or greater. Figure 1-1 shows the percent-of-slope symbols. Percent of slope is the
ratio of the change in elevation (vertical distance to horizontal distance, multiplied by 100).
Reconnaissance personnel can use several methods to calculate and report the percent of
slope (Always round the answer up to the next whole number [symbolized by ♂]).
6
5 but less than 7 percent
9
7 but less than 10 percent
11
10 but less than 14 percent
14 percent and greater
17
NOTE: The arrows point uphill.
Figure 1-1. Percent-of-Slope Symbols
EN 5622
1-2
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