Marine Horns: Electric, Air-Horn & Hailer Part Identification

Marine horns, portable air horns and loudhailer speakers serve different purposes. A 12-volt electric horn produces a warning sound from the boat's electrical system. An aerosol air horn sounds using a pressurized canister. A hailer speaker, on the other hand, is the output of a compatible audio or public-address system rather than a self-contained electrical horn. Compare these products by function and exact manufacturer number before replacing equipment.

Three different types of marine sound equipment

12V electric signal hornsSchmitt/Ongaro 10012 and 10028 are larger dual-trumpet horns; 10050 is a compact drop-in low-tone horn. They operate from a suitable 12V DC circuit. Electrical load and mounting requirements differ between the models.
Portable aerosol signal hornMoeller 054300-10 is an air-horn kit, rated at 120 dB. Moeller 05430110 is the corresponding 8-ounce aerosol replacement canister only. Neither is wired as a 12V electric horn.
Hailer speaker equipmentNewmar PA-30/20, PA-40/30 and PA-60/40 are waterproof hailer horn speakers rated by continuous and peak power. They require a compatible amplifier or hailer unit; they are not direct replacements for a horn button and 12V horn circuit.

Marine horn and hailer MPN comparison

MPN Category Published rating Product description
Schmitt/Ongaro 10012 12V electric horn 120 dB listed; 7 A; 304 stainless steel Deluxe dual shorty trumpet horn
Schmitt/Ongaro 10028 12V electric horn 125 dB listed; 8 A; stainless steel Deluxe dual trumpet horn
Schmitt/Ongaro 10050 12V compact electric horn 106 dB listed; 3 A; stainless construction Mini drop-in low horn
Moeller 054300-10 Aerosol-powered horn 120 dB listed; trumpet and canister kit Marine air-horn kit
Moeller 05430110 Refill canister only 8 oz refill listed for 054300-10 Air-horn aerosol refill
Newmar PA-30/20 Hailer speaker 20 W RMS / 30 W peak Waterproof hailer horn speaker
Newmar PA-40/30 Hailer speaker 30 W RMS / 40 W peak Waterproof hailer horn speaker
Newmar PA-60/40 Hailer speaker 40 W RMS / 60 W peak Waterproof hailer horn speaker

The electric-horn sound-level figures are catalog-listed decibel ratings, while Newmar's hailer ratings describe speaker power. These numbers measure different properties and should not be treated as equivalent. Sound output also depends on installation, signal source and operating conditions.

Hailer speakers are not self-powered horns. Newmar's hailer units are specified for compatible 8-ohm audio output connections. Confirm the original hailer unit's permissible speaker impedance, RMS output, peak handling and wiring before selecting a replacement. Do not apply 12V battery power directly to a speaker.

Choosing a replacement electric horn

The Schmitt/Ongaro 10012 is a compact dual-shorty trumpet design with catalog-listed 120 dB output and 7-amp current draw. The longer dual-trumpet 10028 is listed at 125 dB and 8 amps. The smaller 10050 mini drop-in horn is rated at 106 dB and 3 amps. All three use 12V DC, but the housing and mounting differ; check the boat's original opening, cable, switching and fuse protection.

When an aerosol horn or refill makes more sense

Moeller 054300-10 is supplied as a complete red air-horn kit for manually operated audible signalling. The 05430110 is an 8-ounce replacement aerosol canister listed for that horn. It does not supply a trumpet or an electric-horn motor. Store and handle the pressurized canister according to its instructions, away from excessive heat and ignition sources, and check any applicable carriage rules for your vessel.

What to verify before buying

  1. Identify the equipment category. Determine whether the failed item is a DC-powered warning horn, manually operated aerosol horn, replacement refill or hailer loudspeaker.
  2. Record the complete manufacturer MPN. Similar-looking horns may use different mounting hardware, supply current or speaker impedance.
  3. Check mounting clearances. Measure the existing footprint, fastener positions, deck or console cutout and moisture exposure. A listed diameter does not automatically describe the required mounting hole.
  4. For electric horns, check the circuit. Verify the rated voltage, protection device, switching and cable capacity from the manufacturer's instructions. The 10012, 10028 and 10050 have different current ratings.
  5. For hailers, check the audio system. Match the amplifier output impedance and power handling to the exact speaker; do not assume the larger wattage model will work with every hailer.
  6. Confirm required signalling equipment. Applicable navigation rules depend on vessel particulars and operating waters. A replacement or backup horn should meet the vessel's actual requirements rather than merely producing an audible sound.

Shop exact marine horn and hailer products

These cards open their corresponding UsedRVParts.ca listings. Check product condition and availability before ordering. The store offers brand-new as well as used parts; viewing or pickup of eligible used inventory in Kelowna is by appointment.

Related marine horn controls

If the original horn works but the control button is damaged, see our Sea-Dog push-pull and horn-button switch guide. Confirm switch ratings and installation requirements independently rather than assuming a particular button can carry the load of every horn.

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