The Storm All Weather Orange Safety Whistle has been designed such that it increases the sound that is much higher than the regular whistles that are marketed. This type of whistle really works underwater and can be heard by people who are down by about 50 feet inside the water. When they were tested for the loudness in comparison to the regular whistles it showed that the sound was twice powerful than the regular whistles. These whistles have been designed such that they are sleek and compact and easy to carry and handle. These whistles are waterproof and have tremendous power in them and are being used by the Navy for safety and rescue purposes.