Shallow Water Depth Finders
 

On Thu, 21 Aug 2008 23:07:30 -0700, Calif Bill penned the following
well considered thoughts to the readers of rec.boats:

|
|"Gene Kearns" wrote in message
e.com...
| On Mon, 18 Aug 2008 15:16:03 -0400, hk penned the following well
| considered thoughts to the readers of rec.boats:
|
| |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.
|
| SWAG would be.... 50/200 kHz
|
| --
| Agent 5.00 Build 1159
| Grady-White Gulfstream, out of Oak Island, NC.
|
| Homepage
| http://pamandgene.idleplay.net/
|
| Rec.boats at Lee Yeaton's Bayguide
| http://www.thebayguide.com/rec.boats
|
|Probably a bad SWAG. There were some 120khz units out there, and could be
|used in conjunction with a 200 khz.
|

I don't think so, but possibly. Those are the two most common pairs...
until recently. Now, with Furuno, you can get a unit selectable
between 28, 38, 50, 88, 107, and 200kHz).

--
Agent 5.00 Build 1159
Grady-White Gulfstream, out of Oak Island, NC.

Homepage
http://pamandgene.idleplay.net/

Rec.boats at Lee Yeaton's Bayguide
http://www.thebayguide.com/rec.boats