On Mon, 18 Aug 2008 15:16:03 -0400, hk wrote:

Short Wave Sportfishing wrote:
On Mon, 18 Aug 2008 14:53:28 -0400, hk wrote:

Short Wave Sportfishing wrote:
On Mon, 18 Aug 2008 10:34:34 -0400, DownTime
wrote:

- Can you put two different transducers, from two different
manufacturers on the same stern and each will function accordingly? I
guess I am wondering of Garmin's transducer and branx X's(assuming I go
that route) might interfere with each other.
Well, no - not on a small boat. The two signals will interfere with
each other. Even at twenty feet or so, they will interfere - I have a
transducer mounted on my trolling motor which is 21 feet away from the
stern and they still interfere with each other.

Has to do with the angle of the beam.

With respect to shallow water performance, that's natural. Get within
five feet of the bottom and the signal return will be overpowering and
produce nothing but hash. Plus, if the bottom is muddy, you can get
false returns to hard bottom. I've turned down the sensitivity on my
Raymarine DS600 to zero and still can't get a reliable reading under 5
feet.

Shallow water fishing is mostly sight fishing anyway. Even in deeper
water, depending on the species, it's mostly sight fishing.

The best way to handle this situation is to set the offset for your
draft - at least that will tell you what you are getting into shallow
waters.

On my previous Parker, I had a Furuno fishfinder in the cabin and a
Lowrance fishfinder mounted in the cockpit. They were wired to different
transducers on opposite sides of the transom. The transducers were
different frequencies. Both units worked just fine, even when both were
operating at the same time.

Thus, the answer to the question of two transducers is - maybe.

Um...what frequencies?

I don't remember. They were installed in 2003, and I sold that boat off
last year, but before installing them, I spoke with someone at Lowrance,
and he said the two frequencies would not interfere with each other.

Two seperate frequencies is a different issue than two at the same
frequency which is what I assumed the OP was talking about.