Shots-
A pattern of three shots is the most common method of signaling used by hunters. However, three shots too close together aren't going to get anyone's attention; they will just think the first two shots merely missed the target. Therefore, it is a good idea to separate the shots by about 3 to 5 seconds. Any longer than that and the listener will not recognize it as a distress signal. The best time to use this method is after dark because hunting is illegal during this time, so other hunters or officials will be more alert to such activities.

Whistles, Horns, and Other Sound-Emitting Devices-
A shrill, police-like whistle is a good device to use because of its piercing sound which will travel great distances. This whistle should be packed in your survival kit. A freon or compressed air horn is very loud and would be heard at greater distances than the whistle. An automobile horn can also be used in an emergency situation. Again, all those signals should be sounded in a pattern of three blasts.