Aeronautical Information Manual (AIM), page 427

Index   426 -- Page 427 -- 428

12/10/15                                                                                                                                                 AIM

                                                                                     FIG 6-2-1
                                                    Ground-Air Visual Code for Use by Survivors

                                        NO.                                 MESSAGE                                         CODE SYMBOL

                                          1             Require assistance                                                          V
                                          2             Require medical assistance                                                  X
                                          3             No or Negative                                                              N
                                          4             Yes or Affirmative                                                          Y
                                          5             Proceeding in this direction

                                   IF IN DOUBT, USE INTERNATIONAL SYMBOL

        1.  Lay out symbols by using strips of fabric or parachutes, pieces of wood, stones, or any available material.
        2.  Provide as much color contrast as possible between material used for symbols and background against which symbols are exposed.
        3.  Symbols should be at least 10 feet high or larger. Care should be taken to lay out symbols exactly as shown.
        4.  In addition to using symbols, every effort is to be made to attract attention by means of radio, flares, smoke, or other available means.
        5.  On snow covered ground, signals can be made by dragging, shoveling or tramping. Depressed areas forming symbols will
           appear black from the air.
        6. Pilot should acknowledge message by rocking wings from side to side.

                                                                                     FIG 6-2-2
                                         Ground-Air Visual Code for use by Ground Search Parties

                                         NO.                                   MESSAGE                                              CODE SYMBOL

                                          1              Operation completed.                                                         L L L
                                          2              We have found all personnel.                                                   L L
                                          3              We have found only some personnel.
                                                         We are not able to continue.
                                                         Returning to base.                                                             X X
                                                         Have divided into two groups.
                                                         Each proceeding in direction indicated.

                                          6              Information received that aircraft is in this direction.

                                          7              Nothing found. Will continue search.                                          N N
     Note: These visual signals have been accepted for international use and appear in Annex 12 to the Convention on International
           Civil Aviation.

Emergency Services Available to Pilots                                                                                                                  6-2-7

Page 427 of the Aeronautical Information Manual (AIM.pdf)
AIM: Official Guide to Basic Flight Information and ATC Procedures

Index   426 -- Page 427 -- 428