Raymarine Radar

[jwalker]

Yes.

[ben5883]

on powerboats transom mounts are the nuts but ou need to make sure you have the right one designed for the speeds you guys do, through hulls and in hulls dont work as well on the plane on a rib as they do in other boats. If it aint working above 10 knots have a wod with the dealer you bought it from see what the problem could be

[jwalker]

Originally Posted by ben5883

....on powerboats transom mounts are the nuts ......through hulls and in hulls dont work as well on the plane on a rib

ben, that is not my experience and I know others on the forum feel similarly. Even if the tranducer is placed well and manages to track the bottom at speed, ribs frequently leave the water and the sounder will loose the bottom and not manage to lock on again before the boat hops off another wave. Also, transom mount transducers are designed to kick up on impact and they do this on landing.

Because of Codder's comment in this thread, when I was last out I took note of the the sounder when I was over the deeper areas of water and travelling at about 35 knots over chop, the sounder was following the bottom detail without a problem at 185ft. This is a simple Garmin unit with a transom transducer stuck to the inside of the hull using silicon about 1metre forward of the transom.

[ben5883]

jwalker thanks for the reponse it is interesting to know what u guys think as my coastl ribbing is limited. However surely it would make no difference what you have if u r airbon. Also if you come up onto the plane then the sonare will not be looking down but at an angle through the water then refraction etc would take place and relay an image which is not true.?? Just my views and thinkin would be nice to know what u guys think

[codprawn]

With my transom mount transducer I have to wait about 10 seconds after coming off the plane for all the bubbles to go before I can see anything - will give it a try sticking it in the hull. I will miss the paddle wheel but it doesn't seem very accurate and the water temp though.

[jwalker]

Originally Posted by ben5883

However surely it would make no difference what you have if u r airbon.

Yes, that is the case. I maybe didn't express myself as clearly as I should have done. I was relating the hopping over waves and the transom mount transducer knocking up.
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Codders, I found the paddle wheel to be a useless device unless I was moving at displacement speed.

[ben5883]

Originally Posted by codprawn

With my transom mount transducer I have to wait about 10 seconds after coming off the plane for all the bubbles to go before I can see anything - will give it a try sticking it in the hull. I will miss the paddle wheel but it doesn't seem very accurate and the water temp though.

i dont think you will be able to just stick the transom mount transducer inside the hull, that will almost definately not work. if ou get interference from bubbles and stuff when on ht eplane, it oculdbe your transom mount is mounted in the wrong place, it usually takes 4/5 tries to get it correct after a good few test runs