Search & Rescue Whistle Signals - information from the Civilian Air Patrol

            1 short    Go

            2 short    Stop

            3 short    Danger, proceed unless you encounter a problem that you must stop for.

            1 long    Assemble on the team leader's position

Only one person on the team should be giving whistle signals at a time. Members finding the target or some other form of clue should yell "Find!" and stop where they are. The team leader or assistant will come and investigate while other members of the team will stay where they are. Sometimes though, the rest of the team may not understand your yell of "Find!" over sounds in the area or a person on the team calling out to possible survivors, and the rest of the team may actually continue moving.

Using your whistle to blow the command for stop will alert the team leader to your situation, and stop the team. The only other time team members should blow their whistle is if they encounter a danger area or become hurt themselves.