4Boats
Osculati 12V Flush Mount Boat Horn White 112dB 21.101.00
Osculati 12V Flush Mount Boat Horn White 112dB 21.101.00
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Osculati 12V Flush-Mount Spiral Boat Horn
Osculati Marine Equipment | 21.101.00
Osculati 21.101.00 is a compact 12 V diaphragm horn with a spiral acoustic amplifier. The horn body mounts behind the panel, leaving a white ABS grille visible, and produces a rated sound level of 112 dB.
Key Features
- ✔ 112 dB rated acoustic output
- ✔ 12 V DC operation
- ✔ Spiral amplifier increases sound output
- ✔ Flush-mount installation with white grille
- ✔ ABS body and grille
- ✔ Compact concealed horn body
Technical Specs
| Voltage | 12 V DC |
| Sound level | 112 dB |
| Faceplate | 141 × 79 mm |
| Panel recess | 96 × 60 mm |
| Required inner depth | 110 mm |
| Body / grille | ABS / white |
| Osculati code | 21.101.00 |
| 4Boats SKU | 556-21.101.00 |
Compatibility / Fitment Guide
Panel fit: requires a flat area for the 141 × 79 mm grille, a 96 × 60 mm recess and at least 110 mm unobstructed depth. Check wiring, drainage and access before cutting.
Electrical fit: connect to a protected 12 V DC circuit using marine cable, switch and fuse sized for the horn’s measured current and cable run. Do not connect directly to 24 V.
Location: mount where the grille can radiate sound without being blocked, while protecting the rear body and terminals from direct water exposure.
Regulatory caution: COLREG compliance depends on vessel length, fundamental frequency, audibility range and type approval—not only 112 dB. No approval certificate is claimed here; verify the vessel’s statutory sound-signalling requirement separately.
Part Number Cross Reference
| Osculati part | 21.101.00 |
| Catalogue description | Flush-mount horn with spiral amplifier |
| 4Boats SKU | 556-21.101.00 |
Frequently Asked Questions
Will it fit a 24 V boat?
Not directly. This model is rated for 12 V DC.
What cut-out is required?
The catalogue recess is 96 × 60 mm with 110 mm depth; the faceplate is 141 × 79 mm.
Is it COLREG approved?
A 112 dB rating alone is insufficient to make that claim. Check approval documents and vessel-length requirements.
Can it be mounted fully exposed?
The grille is external, but the rear body and wiring should be protected from direct water ingress.
Test the horn regularly and keep the sound path clear. Use suitable over-current protection and verify any mandatory sound-signalling certification for the vessel.
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