We have been asked if we would supply a non metal whistle and this appealed because it has an incredibly loud whistle! It is compact with no moving part, British made and much loved by mariners (apparently!)
The Howler Whistle is incredibly loud. It is compact with no moving parts to break or seize up in cold weather. This British made whistle is used in the BCB Special Forces Survival Kit and is commonly used by survivalists, mariners and sports enthusiasts.
The purpose of the signal whistle is a simple one. It is to draw attention to yourself, and your situation, so that you can get help. The shrill sound from a survival whistle, or signal whistle, travels much farther than yelling, takes less energy, and works even if your injuries keep you from making noise by other methods. If a searcher cannot pinpoint your location, (s)he cannot help you.
Every survival situation requires a signal whistle. Even if you don't purchase the Howler Signal Whistle, we highly suggest one for every kit or excursion.
I've had severe hearing loss for many years and due to an infection lost considerably more during February. I bought "The Howler" as I could not hear my current whistles. Even I can hear this so it must be loud and thus effective in an emergency situation.