BruceK
Well-Known Member
I'd rather prefer to plunder them before they sink.
Horns - Hoot Hoot
- Thread starter Fire99
- Start date
I'd rather prefer to plunder them before they sink.
Piers
Well-Known Member
A somewhat crucial element of fitting a horn, depends on two factors. The boat's LOA (>12m) and whether the horn is approved. The manufacturer must be able to provide a Certificate of Conformance from an independent Class Society or Flag State Authority such as ABS or Lloyds. This is an important difference from a manufacturer supplying their own certificate stating the horn complies with the IMO specifications. If push came to shove, an insurance company may request this in case of an unfortunate accident.
I believe the current IMO specs are (By Length of Vessel, Db readings in a 1/3 Octave Band @ 1 Meter), although I could be out of date!
200 Meters (656 ft.) or more: 70-200 Hz, 143 dB
75 to 200 Meters (246 to 656 ft.): 130-350 Hz, 138 dB
20 to 75 Meters (65 to 246 ft.): 250-700 Hz, 130 dB
12 to 20 Meters (40 to 65 ft.): 180-450 Hz, 120 dB
Piers
I believe the current IMO specs are (By Length of Vessel, Db readings in a 1/3 Octave Band @ 1 Meter), although I could be out of date!
200 Meters (656 ft.) or more: 70-200 Hz, 143 dB
75 to 200 Meters (246 to 656 ft.): 130-350 Hz, 138 dB
20 to 75 Meters (65 to 246 ft.): 250-700 Hz, 130 dB
12 to 20 Meters (40 to 65 ft.): 180-450 Hz, 120 dB
Piers
Fire99
Well-Known Member
I'm impressed.. That's a good sound!
Fire99
Well-Known Member
Strewth, that suddenly got complicated. So we're looking at a minimum of 120db for a vessel of 12-20 metres?
Piers
Well-Known Member
Yes. It's all part of the colregs.
ChromeDome
Well-Known Member
My boat is below 12m, so I'll just ignore that and pretend everything is fine.
Fire99
Well-Known Member
Haha... Well it sound great to me. More than enough to blast the dozy loiters out of the way..
Piers
Well-Known Member
...and that's the right answer!
chillee
Well-Known Member
I had the Redjet steam up behind me at the weekend and toot me out of the way. That is loud 
Fire99
Well-Known Member
Is that the IOW ferry? I can imagine just the noise alone may have made your boat change courseI had the Redjet steam up behind me at the weekend and toot me out of the way. That is loud
ChromeDome
Well-Known Member
At the time of scouting the market I realized that the Osculati horn of course wasn't their own design.
There are several out there looking the same (ish) but no specifics prove if they are.
After receiving the parcel it became clear that it is made in Taiwan and has number hyf-305lt.
Might be helpful in your search...
There are several out there looking the same (ish) but no specifics prove if they are.
After receiving the parcel it became clear that it is made in Taiwan and has number hyf-305lt.
Might be helpful in your search...
Fire99
Well-Known Member
Sorry a little late replying here but thanks a lot for the info. That's helpful.. I'll do a bit more research..
Fire99
Well-Known Member
Well I 've ordered a FIAMM TA Dual Tone horn so i'll report back when it's fitted to see if it hoots loud enough or not. Hoot Hoot! 
Hot Property
Well-Known Member
Or you could try this
12v 150db Car Air Horn Blast Compact Twin Tone Loud Horn Truck Lorry Suv Boat UK | eBay
£10.29 delivered. The compressor is metal cased and the whole horn looks robust.
12v relay included, I'll be fitting this to my rib console. It will be located inside but I suspect it will be sufficiently loud nevertheless!
12v 150db Car Air Horn Blast Compact Twin Tone Loud Horn Truck Lorry Suv Boat UK | eBay
£10.29 delivered. The compressor is metal cased and the whole horn looks robust.
12v relay included, I'll be fitting this to my rib console. It will be located inside but I suspect it will be sufficiently loud nevertheless!
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superheat6k
Well-Known Member
But there is a slight and unnerving pause between the press of the button and the compressor winding up to last the horn. I prefer the direct electric.
ChromeDome
Well-Known Member
If you want to avoid the delay with an air horn, the compressed air must be ready in a tank close to the horn (like e.g. trucks).
12 Volt Replacement Horns And Specialty Air Horn Installation
A lot, compared to the electric horn - and the compressor will run independently of the use to keep the tank pressurized.
TBH i found the Fiamm TA Dual and the Osculati (#19) to be equally good. Time will show if the latter works for 9 years like the FIAMM did.
12 Volt Replacement Horns And Specialty Air Horn Installation
A lot, compared to the electric horn - and the compressor will run independently of the use to keep the tank pressurized.
TBH i found the Fiamm TA Dual and the Osculati (#19) to be equally good. Time will show if the latter works for 9 years like the FIAMM did.
Elessar
Well-Known Member
Everyone says good but expensive about the Kahlenburg. But what was the ££££?I bought a pair of Kahlenberg's from Piers years ago, for my old F43 - I must say if my current horns fade, I will do so again, they were expensive but excellent! When you sounded them everyone looked around for a bigger boat
dunedin
Well-Known Member
Just out of ignorance, but what do you need the horn for (other than the Queens Jubilee hoot and very occasional fog)?
Never heard of a private sailing yacht having an installed horn.
Never heard of a private sailing yacht having an installed horn.
michael_w
Well-Known Member
My father's boat had a horn fitted to the mizzen. Wonderful discordant sound like an American locomotive.
ChromeDome
Well-Known Member
I bought a pair of Kahlenberg's from Piers years ago, for my old F43 - I must say if my current horns fade, I will do so again, they were expensive but excellent! When you sounded them everyone looked around for a bigger boat
You certainly don't want people to look for a moped out there when you sound the horn