Are there standard whistle signals for communicating with separate party members?
The whistle can attract attention in all weather conditions. As long as you have the breath to blow, It's can save your life!
S.O.S call is the most common known signal for "HELP”. You can use other things beside the whistle to send an S.O.S (like lights or flags), but the code is still the same: three dots, three dashes, and three more dots. The dot is a short, sharp pulse for three seconds long.
The dash is a longer pulse, approximately six seconds long. When calling an S.O.S signal call, keep repeating the signal, and for as long as you need it.
The S.O.S is the internationally recognized distress signal in “Morse Code. S.O.S gets a number of nicknames over the years and associated with such phrases as "save our ship", "save our souls" and "send out succor." But none of those are actually what it means.
The strange truth is that SOS does not actually say anything. Actually, SOS is only one of several ways that the combination could have been written. Using the code VTB would produce exactly the same dots and dashes, but for some reason, SOS was chosen to describe this combination. SOS is the only 9-element signal in Morse code. Making it easily recognizable, since no additional symbol apply more than 8 elements.
International Whistle Codes
Three strong blows of the whistle are an international distress call, which is loosely translated to "Help me!" Two blows of the whistle are a call-back signal which means "Come here." One blow can mean "Where are you?" or it can be a call-back signal if you hear anything that sounds like a code.
Each whistle blast should last 3 seconds.
In 1836, the American artist Samuel F. B. Morse and two other physicists developed an electrical telegraph system. Morse's code became the popular method of communicating with clicks, beeps, or flashing lights by telegraph operators. International Morse Code code is the ISO basic Latin alphabet, some extra Latin letters, the Arabic numerals, and a small set of punctuation and procedure signals.
Have you ever had a backpacking trip that was a disaster - even though you brought everything you needed?