19-21. On a sunny day, a mirror is your best signaling device. If you don't have a mirror, polish your canteen cup, your belt buckle, or a similar object that will reflect the sun's rays. Direct the flashes in one area so that they are secure from enemy observation. Practice using a mirror or shiny object for signaling now; do not wait until you need it. If you have an MK-3 signal mirror, follow the instructions on its back (Figure 19-3). An alternate, easier method of aiming the signal mirror is to catch the reflection on the palm of your hand or in between two fingers held up in a "V" or "peace sign." Now slowly move your hand so that it is just below your aim point or until the aircraft is between the "V" in your fingers, keeping the glare on your palm. Then move the mirror slowly and rhythmically up and down off your hand and onto the aim point as in Figures 19-4 and 19-5.
Figure 19-3. MK-3 Signal Mirror
Figure 19-4. Aiming an Improvised Signal Mirror
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