Stus-List New sonar transducer

Frederick G Street fred at
Wed Feb 22 14:10:19 EST 2017

Jeremy — to get greater depths, you need a transducer that will accept more power from the sounder, as well as a sounder that can provide that power.  The typical transducer most of us have on our boats is rated at 60 watts; but they’ll take up to 100 watts if the sounder can provide that much power.  At 100 watts, Airmar says they can reach 600 feet in depth under good conditions.

From there, you can jump up to transducers rated at 600 to 1000 watts; these are typically used on high-end fish finder systems designed for the greater power outputs.  I’m thinking it makes the fisherman’s job easier, as that much power probably stuns the fish, which then floats to the surface to be picked up…   :^)

— Fred

Fred Street -- Minneapolis
S/V Oceanis (1979 C&C Landfall 38) -- on the hard in Bayfield, WI   :^(

> On Feb 22, 2017, at 9:09 AM, Rick Brass via CnC-List <cnc-list at> wrote:
> Jeremy;
> In 24 years of keelboat ownership, covering several boats and several iterations of sounders and plotter/sounders from Raymarine, Garmin, Lawrence, and Standard Horizon, I don’t recall ever having a sounder that would work for depths over 200 feet. I suspect there are “professional” units that will do it, but also suspect they are more expensive than the units we would buy for our recreational boats.
> Maybe Fred Street can weigh in on what would be needed for greater depth. 
> But my question is” Why do you need depths over 200 ft.?”
> Rick Brass
> Washington, NC
> From: CnC-List [mailto:cnc-list-bounces at <mailto:cnc-list-bounces at>] On Behalf Of Jeremy Ralph via CnC-List
> Sent: Wednesday, February 22, 2017 12:06 AM
> To: cnc-list at <mailto:cnc-list at>
> Cc: Jeremy Ralph <jeremy.ralph at <mailto:jeremy.ralph at>>
> Subject: Stus-List New sonar transducer
> Planning to install new thru hull transducer when I haul the boat in the coming weeks.  Trying to decide on: i) a simple depth only display, or ii) a more elaborate chart plotter with depth.  
> For chart and depth, I currently use my iPhone in a waterproof case on a RAM mount. Navionics for charts and for depth a SonarPhone TBox with an in-hull transducer.  This works fine for my purposes but it would be good to have redundancy and something that works for deeper depths (>200ft). 
> Any recommendations?
> Thanks,
>   Jeremy 

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