TREM Gas Air Horn 250ml - Hand Held Signal Horn with Canister

The TREM gas air horn is a hand-held signal horn made up of a plastic trumpet fitted to a 250ml gas canister. Press the button and it gives a loud blast rated at 108dB at 1 metre, with no batteries or power supply needed. It suits boats, where a sound signal device is required safety equipment in some states, and for sporting events, evacuation alerts and noisy industrial sites.

Features

• Loud blast, rated 108dB at 1 metre
• Hand operated, no batteries or power supply
• Gas does not contain substances harmful to the ozone layer (no CFC)
• Compact and lightweight for storage
• Canister is replaceable; a 250ml refill canister is sold separately

Specifications

• Brand: TREM
• Type: hand-held gas signal horn
• Contents: plastic trumpet and 250ml gas canister
• Output: 108dB at 1 metre (manufacturer rating)
• Nominal frequency: about 550Hz (varies with how it is operated)
• Power: none required
• Refill: 250ml gas refill canister, sold separately

Why carry an air horn on a boat?

Sound signals let other skippers know what you are doing and help prevent collisions. In New South Wales, Transport for NSW lists a sound signal device, such as an air horn, bell or whistle, as essential safety equipment for powerboats and sailing boats. A short blast is about 1 second and a long blast is 4 to 6 seconds. Requirements differ between states and vessel types, so check the rules of the maritime authority where you boat.

Read our boating safety guide for the rest of the safety gear to carry on the water.

Other uses for an air horn

• Workplaces and sites: a simple evacuation or warning signal in noisy areas or where there is no PA system.
• Sport: start and finish signals and crowd alerts at carnivals and events.
• Remote areas: attracting attention when calling out is not loud enough.

It does not replace a building fire alarm, a distress beacon (EPIRB or PLB) or a marine radio. For an emergency at sea, use a radio or beacon to call for help.

Using and storing it safely

• Never sound it close to anyone's ears, and use hearing protection if you sound it often. Repeated loud blasts can damage hearing.
• Keep the canister out of direct sun and heat, and away from flames. Do not puncture or burn it, even when empty.
• Follow the safety instructions printed on the canister.
• Check and test it as the canister label directs, and carry a spare 250ml refill canister, sold separately, as the gas runs out with use.

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Air Horn FAQs