The Storm All-Weather Safety Whistle stands as the market's leading marine whistle, boasting an unparalleled volume. Its innovative patented design ensures it can be heard underwater up to 50 feet, thanks to a sounding chamber that expels all water when blown. Proudly made in the USA, this whistle is an essential for divers, lifeguards, and any recreational activity on or near water. It produces a sharp, high-frequency sound, significantly outperforming other referee and safety whistles with a power rating over 75% greater.