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If you are already in an emergency situation, you can practice using your signal mirror while waiting for a potential rescue target, like a passing bush plane.
Driving test examiners often refer to learner drivers driving on ‘rails’ by following routines like a robot. Although it is important to understand the fundamental reasons why these routines are used, an ability to change or alter a routine at any given moment is the key to not only passing the driving test, but to help reduce the possibility of accidents. OTHER DRIVING ROUTINES USED FOR LEARNING TO DRIVE With a flash that can be seen for up to 100 miles, the signal mirror has been called the most under rated survival tool in a survival kit. Best results with the MIL-M-18371E, Military Glass Signal Mirror are achieved when the air is clear and the sun is well above the horizon. However, visible signal flashes can be created even on hazy or overcast days. Signal flashes can be seen even when you cannot see the aircraft, boat, or other means of rescue. So when signaling and no specific targets are in sight, be sure to continually sweep the horizon with the signal mirror to maximize your chances of being seen. At night, flashlights, headlights, and moonlight can produce effective signals with your Military Glass Signal Mirror. So use your own judgment on that. If you opt for glass, carry your mirror in a Bubble-Wrap sleeve to prevent it from being damaged [source: Nester].
Steinbach, Robert (1989). The Lives of Frank and Alice Baldwin (1ed.). Austin: University of Texas Press. p. 136. ISBN 0-292-74659-8. When practicing, using an inanimate object as your target is ideal. Do not aim your signal mirror at any human being, for this can cause temporary blindness and lead to accidents. A good signal mirror should have a small hole in the center with a retro-reflective grid to make aiming easier. R. W. Burns (2004) Communications: An International History of the Formative Years. Google Books. Retrieved on 2 June 2008. pp. 192-196 discuss the heliograph. Mance, Henry (10 February 1872). "The Heliograph or Sun Telegraph". United Service Institution of India. 1 (5): 123–130. hdl: 2027/mdp.39015035103855 . Retrieved 16 June 2013.
before any change of direction including turning left or right, overtaking other vehicles or cyclists and changing lanes Retroreflective viewing hole:Not all products have retroreflective material in the viewing hole. Without this, you won’t see the “fireball” effect in the viewing hole.
When sending signals upwards, the range is much further. The signal can go up to 10 miles (52,800 feet) in the air. Some claim that signal mirrors can transmit 100 miles away. Other Benefits Material: Plastic is generally better than glass because it won’t break as easily. It also doesn’t scratch as easily as metal signal mirrors. Modern signal mirrors use plastic which is highly reflective. However, many people prefer glass signal mirrors because they generally can reflect longer distances. Stainless steel also reflects further than most plastic signal mirrors, but scratches very easily. Finally, after two desperate nights in the water, they got the idea of using shiny credit cards to reflect sunlight at a plane, which spotted them [source: Murray]. Could Cause an Accident: The light from the signal mirror could go into someone’s eyes and temporarily blind them. This could result in an accident. It is important that you stop aiming the signal mirror at planes once you have been spotted. When using a signal mirror, you need to have a basic understanding of reflection and light as well.
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