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Whistle in detail:

As long as people who often engage in outdoor activities, believe that they will bring whistles, but how many people really understand the use of whistles.

Meaning. A whistle is not necessarily used only in emergencies, such as greeting each other to determine the approximate distance and to identify the other party.

It's somewhere around there, but don't get too excited, because sometimes people just blow off some steam when they're out.

Whistle, if blown too often, people will get used to it and when it's really necessary to blow the whistle for help, no one will respond. This is another story of the boy who cried wolf. Now let me introduce to you the meanings of the signals such as whistle sounds and lights.

Explanation:

1. Short tone (within one second)

2. Long Vowels (Over 3 Seconds)

3. The whistle interval within the command is 2-3 seconds.

4. Instructions should be at least 30 seconds apart.

International SOS emergency signal: three short, three long, three short, one minute later repeat.

International common high-altitude emergency call: six short, one minute later continue to repeat.

The international common high-altitude emergency signal and the international common SOS emergency signal can be used interchangeably, but the 6-short signal is specific to high-altitude signals, while SOS is a universal signal.

Communication (T): ■ Used for team contact to determine each other's positions, send a signal after receiving it.

Signal received;

Assembly (U): ● ● ■ Gather towards the direction of the signal;

Advance (V): ● Rest time to indicate the entire team's departure, and during movement to indicate accelerated progress;

Front Team Wait (W): ● ■ ■ Used when the front team needs to wait for the rear team due to the long distance of the march.

Support requested (S): ● ● ● When encountering difficulties and needing help, send out this signal. The receiver responds with a communication tone.

Report your position and maintain contact with the leading or trailing team: ■ ■ ■ If no response is received, repeat the signal after one minute. Upon receiving the three-long signal, respond with a signal indicating safety: three short, and repeat after one minute.

All of you should know the meanings of the above signals, but do not blow them haphazardly. Except for the rescue signal, other signals are generally blown by the front, middle, and rear personnel. The methods of using mirrors to reflect light and flashlights are the same as blowing whistles.