Dive Alert, gives scuba divers the ability to signal on the surface using a loud, effective air horn. It is essential piece of scuba diver safety gear. Don't be foiled by imitations, get the original Dive Alert scuba horn.

Traditionally scuba divers have relied on whisles as their only form of signalling device in an emergency. But a whistle relies on the diver being able to remove their regulator from their mouth and be able to place the whistle in their mouth and blow hard enough to be heard.