Marco PW3 Nautical Whistle 12V/24V — Approved Marine Air Horn for Vessels 20/75 m
A marine whistle that can be heard 75 meters away: meet the Marco PW3
If you're looking for a sound signalling device for a yacht, boat, or commercial vessel that fully complies with international safety requirements, take a closer look at the Marco PW3 nautical whistle. This certified marine horn for yachts and commercial vessels delivers a sound pressure level of 132 dB, designed for an audible range of 20 to 75 meters — a figure stated right in its name and in its approval under small craft standards
Technical Specifications
Voltage: 12V or 24V (both versions available — part numbers 15200012 and 15200013)
Power consumption: 4.5 A (12V) / 2.5 A (24V)
Frequency: 315 Hz
Sound level: 132 dB (1/3 oct., measured at 1 m)
Horn diameter: ø300 mm
Dimensions: 245 x 465 x 300 mm, weight 2.52 kg
Package: built-in electric solenoid valve for air supply, extended hose (ID 8/6)
Competitive Advantage
What sets the PW3 apart from ordinary automotive or consumer air horns is its approval specifically for vessels 20–75 meters in length. This is not "just a loud boat horn" — it's an engineered, certified boat whistle approved under marine standards (the APPROVED HORNS range image shows certification marks such as Lloyd's, RINA, NMMA and other accreditations typical of the Marco PW3 series).
Key benefits:
Dual voltage out of the box — the same Marco marine whistle is available in 12V and 24V versions, covering virtually the entire range of onboard electrical systems with no adapters needed. Whether you're comparing the Marco PW3 12V vs 24V marine horn, the acoustic performance is identical — only the current draw differs.
Built-in electric solenoid valve — simplified installation and control: this marine horn with built-in electric valve needs no separate valve and no compatibility guesswork, as everything is engineered by the manufacturer as a single system.
Compact yet powerful — with a diameter of just 300 mm, this 132 dB nautical whistle delivers confident audibility at distances up to 75 meters even in wind and engine noise.
Marco brand reliability — an Italian manufacturer with decades of reputation in marine equipment (pumps, compressors, signalling devices), guaranteeing a long service life in salt and humid environments.
Protective caps available — an option that shields the horn from dust, salt, and mechanical damage during the off-season or while moored.
For comparison: cheaper universal air horns often lack official certification for vessels of this class, don't include a built-in valve, and require a separate compressor or manual control — meaning they actually end up costing the owner more and are harder to install. That's why the PW3 is widely regarded as one of the best nautical whistles for yachts and commercial ships in its category.
Other horns in the APPROVED HORNS range (20–75 m)
The Marco PW3 series is not a single model but a whole family of approved whistles for vessels 20 to 75 meters, sharing the same electrical and acoustic specifications (12V/24V, 132 dB, 315 Hz), with different horn finishes to suit different tasks and aesthetics:
PW3 — the base version with a classic flare, part numbers 152 000 12 (12V) / 152 000 13 (24V).
PW3-BC — chrome marine horn with a polished horn, part numbers 152 002 12 / 152 002 13. An excellent choice when appearance on deck matters.
PW3-BB — white marine horn, part numbers 152 003 12 / 152 003 13. Blends well with a light yacht exterior.
PW3-BN — new (NEW) — black matte marine horn, part numbers 152 004 12 / 152 004 13. A great fit for modern vessels with dark styling.
All models share the same technical platform — the only difference is the horn's material and color, so the choice comes down to your vessel's design.
Accessories: protective caps are available to shield the horn — white (ø200 mm, part no. R50 000 06 for PW2 / R50 000 44 for PW3) and black (ø300 mm, part no. R52 000 25 for PW3) — a handy addition that extends the horn's service life.
Summary
The Marco PW3 nautical whistle is a balanced choice for owners of 20–75 meter vessels: certified loudness, a built-in valve, a choice of voltage, and four finish options for any taste (classic, chrome, white, black). If you need a reliable, approved vessel signalling device without the headache of sourcing separate components — the PW3 covers the job "turnkey".
Comments