Signalling Device

  • Posted on: 8 September 2016
  • By: Belinda

A whistle or a small mirror can increase your chances of being heard or seen. It takes much less energy to blow a whistle than it does to yell and the sound carries farther, too. A signalling mirror is responsible for more search and rescue subject sightings by aircraft than any other type of signal, and can be spotted from a rescue plane over 8km (5 miles) away.