Step 4: Whistle while you work...
A whistle is one of the most important pieces of signaling equipment you can carry.
Apart from being a great tool in an emergency, it can also be used for general signaling.
It doesent really matter what whistle you choose but as allways i'll give my recomendations.
Either a Fox 40 Micro or it's older brother, the Fox 40 are your best option but an ACR Res-q is nearly as good.
You can get all of these whistles from Heinnie Haynes or Backpackinglight.com, Google them for more info.