Tank Banger
Definition
A tank banger is a signaling device used to get a diver’s attention underwater by making noise against the scuba cylinder.
More on Tank Banger
Tank bangers are simple signaling tools, often consisting of a rubber loop with a hard knob that wraps around the scuba cylinder. Tapping the knob against the tank creates a sharp sound that travels well underwater. These devices help divers communicate when hand signals are missed, especially in large groups or low visibility. However, overuse can be disruptive to marine life and other divers, so they should be used sparingly and respectfully.
Frequently Asked Questions
Use it to get your buddy’s attention when visual or tactile signals fail—such as in noisy or low-visibility environments.
Yes, the sharp sound travels well through water, though their range is limited compared to air horns or shakers.
No, some prefer other noise-makers like shakers or underwater air horns. It’s a matter of personal preference and dive conditions.
Yes. Overuse or loud noises can stress or repel animals. Use them only when needed.
Stretch the rubber band around the tank, positioning the hard knob so it's easily reachable by hand.