Sonar/fish finder transducers

[Robg71]

Hello,
Just ordering new sonar unit, and looking at a multitude of various figures etc for the transducer....
Does any body have an idea of what i need for my sunseeker....
Through hull transducer.... Looks a bit of a minefield...
Garmin sonar unit gsd 24.
I know theses units start at 100 pounds or so, but definitly not goin mad and spending 1000's
Cheapest to do the job well please, im not fishing in the marianas trench
Regards
Rob

 

[fisherman]

David, at
http://stores.ebay.co.uk/SOUNDERPARTS-for-BOAT-ELECTRONICS

e bay trader, very helpful to me recently. Prices as good as any I could find.

 

[PaulGooch]

Assuming you really mean through hull, as in having a 50mm hole in the hull :

http://www8.garmin.com/marine/brochures/06545_Transducer_Selection_Guide.pdf

010-10194-00 / 010-10194-01 AIRMAR® P319. Available as depth only, or with temp. Fine if you have less then 8 degrees of hull deadrise.

010-10182-00 / 010-10182-01 AIRMAR® B117. As above, but in a bronze housing.

010-10982-00 / 010-10982-01 AIRMAR® B60 Tilted Element. Bronze housing, depth and temp, adjustable for hull deadrise of greater than 8 degrees.

All of the above will perform the same. It's just a case of choosing between a plastic or bronze body and deciding if you want temp as well. Unless you have a hull deadrise greater than 8 degrees, in which case the last one is the best choice.

 

[Robg71]

Thats brilliant, thank you

Ps.... Whats hull dead rise

 

[David2452]

There are transducers and transducers, the GSD24 is an incredibly capable black box and will accept transducers up to 2000w so in a way it seems a pity to "hobble" its capability with a low end transducer, do you want only depth or would you like speed and or water temperature too? In my view a good compromise would be a B744, 600 watts with speed and temperature, it comes with a high speed fairing block which is essential for your purpose. However fitting the thing in the right place is paramount, there’s no point spending money and then presenting the thing with a load of disturbed water or bubbles so make sure you (or your installer) gets it right. I recently fitted a 1kw B260 coupled to a GSD24 as part of a complete nav package and the results were really good and may be appropriate for you if depth and bottom definition / fishfinding is all you are looking for
The following link may assist you in your selection.

http://www8.garmin.com/marine/brochures/06545_Transducer_Selection_Guide.pdf

 

[Robg71]

Thanks very much...
B744 it is.
Just so happens my sum log is broke, so this will do the job nicely with built in speed sensor as well.
Regards

 

[PaulGooch]

<snip> it comes with a high speed fairing block which is essential for your purpose. <snip>

David, why do you say that ?

Why do you think this would be better than one of the cheaper ones, other that it having speed ?

http://www8.garmin.com/marine/brochures/06545_Transducer_Selection_Guide.pdf

Handy link, wish i'd have posted that

 

[David2452]

High speed fairing to reduce turbulance, better because it is 600w and dual frequency which means it will have better deep water performance, with speed and temperature. It's also a heavily built piece of kit which would probably withstand impact better than cheaper models. A bit of bias enters the equasion too as I have always had good results with them and never had a customer complaint yet.