In a survival situation, a simple whistle is an invaluable piece of kit. Small and lightweight, you can make more noise for a sustained amount of time with this trusty device than you can by shouting. A whistle will be louder than you and require less effort to attract audible attention.

Tip: Holding a whistle in your mouth frees up your hands to signal for help.

The Perry Whistle is cheap, durable, properly coloured for survival applications, floats, and can be found in several survival tins.

Cost: Around CDN $1.50