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FM 17-98 SCOUT PLATOON

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tools he can use. He must still be prepared to use terrain association and map-reading skills in case satellite<br />

or land signals are inoperative or unavailable or his digital systems fail. In addition, the platoon leader must<br />

not disregard the effects of terrain on the direction of movement. Terrain features that do not show up on<br />

the digital display (such as hills, valleys, and cliffs) may cause deviations in the route the platoon must take<br />

to reach the next waypoint.<br />

Shift from a known point. Shifting from a known point is a convenient tool for the platoon leader to use as he<br />

maneuvers the platoon and disseminates control measures. The known point is usually a previously distributed graphic<br />

control measure, such as a checkpoint or a TRP. Referencing a location from a known point is done in kilometers. For<br />

example, 500 meters is given as "POINT FIVE," 1,000 meters as "ONE," and 3,500 meters as "THREE POINT<br />

FIVE." Cardinal directions are used. Shifts to the east or west are given first, followed by shifts to the north or south.<br />

As an example, consider the following transmission: "RED SET FROM CHECKPOINT SEVEN – EAST ONE<br />

POINT EIGHT – NORTH ONE POINT SEVEN." This means, "We (the Red element) are set at a position 1,800<br />

meters east and 1,700 meters north from checkpoint 7." Figure 2-13 illustrates this example.<br />

Figure 2-13. Example of shifting from a known point.<br />

Shifts from known points are used routinely to control combat operations. They make reporting of current platoon and<br />

enemy positions easier. As noted, the platoon leader can report his location by referencing a graphic control measure.<br />

The enemy, however, will quickly figure out the known points if they are continually used in the clear on a nonsecure<br />

net. The platoon leader should avoid using the same point more than twice. Instead, he should use a different known<br />

point to reference the same location.<br />

NOTE: Many units routinely use the TIRS or grid index reference system (GIRS) to make shifts from a known<br />

point. TIRS identifies locations based on terrain points previously designated on an overlay; GIRS uses<br />

intersections of four grid squares as the known points.<br />

SECTION 6 — COMMUNICATIONS<br />

Because of the extended frontages and distances over which the scout platoon operates, it must rely heavily on<br />

effective communications techniques. These techniques include not only the means of communications (such wire,<br />

visual signals, or radio) and the proper way of using them, but also the correct application of operational terms and<br />

effective radiotelephone procedures (RTP). The platoon leader must ensure that all of his soldiers understand<br />

communications procedures and the different nets on which the platoon operates.<br />

MEANS OF TACTICAL COMMUNICATIONS<br />

The scout platoon always has several available means of communications. Whether it is using messenger, wire, visual,<br />

sound, or radio signals, the platoon must remain flexible enough to react quickly to new situations. Use of each of

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