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Old 30 December 2003, 13:10   #31
Country: UK - England
Town: Penzance
Boat name: Dark Angel
Make: Ribcraft
Length: 5.85
Engine: Mariner 90HP Four Stroke
Join Date: Oct 2003
Posts: 116
Sorry for taking ages to reply things have been a bit mad!
Two main things;
For normal prop rotation TDCR should always be on the starboard side.
Face of TDCR should be level with hull not below it, unless you have the 'skimmer' type and you'l get away with it.

Main thing to consider is that there should never be any air between the transducer face and the sea bed. Causes of this can be cavitation, tubulence in any form or trying to shoot through a wood hull.

Hope this helps a little - probably too late though!


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Old 04 January 2004, 17:23   #32
Country: Ireland
Town: Dublin & Kerry
Boat name: Limanda
Make: Arvor & Valiant
Length: 6m +
Engine: IB 85hp dsl; 8hp Yam
Join Date: Jan 2001
Posts: 57
As a first option I'm going to get a second transducer and mount it inside the hull. If I still have problems I'll try moving the one on the transom to an alternative position(s). Final solution will be to chuck the 160 and get something else. (Perhaps a bit harsh on Garmin- maybe the problem is the design of the Airmar transducer?).


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Old 05 January 2004, 08:35   #33
Country: UK - Scotland
Town: Oban
Boat name: RIB Tickle
Make: Humber Assault
Length: 5.3m
Engine: Yamaha 60ETO,Tohatsu 3.5
Join Date: Dec 2003
Posts: 371
The reason I mounted mine to port is that a small outboard is mounted on the other side. This was deliberately put there to keep weight to starboard and balance the prop torque.
I actually find the picture very poor on the sounder, when running over large wrecks that I know the position of I find I can hardly make them out making the chance of finding ones I don't have a exact psoition of impossible.
The Lowrance and Eagle units I have used before where much clearer.
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Old 05 January 2004, 08:42   #34
Country: UK - England
Town: Margate / Ramsgate
Boat name: Bumbl
Make: Scorpion
Length: 8m +
Engine: Yanmar diesel
Join Date: Feb 2002
Posts: 2,837
Where does the collective brain of RIBnet think i should move mine to?

Pic taken a few moments ago, drill and silicone at the ready...
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Daniel is offline   Reply With Quote
Old 05 January 2004, 13:41   #35
Country: UK - Wales
Town: Milford Haven
Boat name: Various
Make: Commercial
Length: 10m +
Engine: Screw / Voith / Jets
Join Date: Sep 2002
Posts: 791
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Well, as promised, here's where my transducer is mounted.... it is quite a large lump, and the last transducer I had with a 160 Blue was much smaller and worked at all speeds.
This thing also pops up from time to time in choppy water. I had to mount it right on the chine, or otherwise half of it would be above the back of the hull, and the other half would be quite deep since the V is quite sharp.
I think I will leave it here unless anyone can come up with any suggestions around that sort of area of the back of the boat (not inside). I am happy that it works upto 15knots, and then again at over 20 knots most of the time.

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