![]() Depending on the conditions under which the overlay is made, it may be advisable to plot the positions first on the map, then trace them onto the overlay. Nonstandard symbols invented by the author must be identified in a legend on the overlay. (1) Use standard topographic or military symbols where possible. Use pencils or markers in standard colors that make a lasting mark without cutting the overlay to plot any detail ( FM 101-5-1). It is imperative that absolute accuracy be maintained in plotting the register marks, as the smallest mistake will throw off the overlay.ī. These register marks show the receiver of your overlay exactly where it fits on his map without them, the overlay is difficult to orient. Trace the grid intersections nearest the two opposite corners of the overlay using a straightedge and label each with the proper grid coordinates. Then, if possible, attach it to the edges of the map with tape. Orient the overlay over the place on the map to be annotated. ![]() There are three steps in the making of a map overlay-orienting the overlay material, plotting and symbolizing the detail, and adding the required marginal information ( Figure 7-1).Ī. They are also used as annexes to reports made in the field because they can clarify matters that are difficult to explain clearly in writing. They show detail that will aid in understanding the orders, displays of communication networks, and so forth. Overlays are used to display military operations with enemy and friendly troop dispositions, and as supplements to orders sent to the field. ![]() When the overlay is placed over the graphic, the details plotted on the overlay are shown in their true position. Information is plotted on the overlay at the same scale as on the map, aerial photograph, or other graphic being used. It is often used as a supplement to orders given in the field. It is used to display supplemental map and tactical information related to military operations. CHAPTER 7 OVERLAYS An overlay is a clear sheet of plastic or semi-transparent paper. ![]()
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