Reply
 
Thread Tools Search this Thread
 
Old 18 December 2009, 08:42   #1
NSS
RIBnet supporter
 
NSS's Avatar
 
Country: UK - England
Town: Southampton
Boat name: cariboo too
Make: WB Generation 430
Length: 4m +
Engine: Honda BF50
Join Date: Oct 2009
Posts: 501
Depth Sounder or Fish Finder?

Hi all. Would appreciate some advice on what would be most suitable to fit to my Avon 340.

Am not overly bothered about locating fish, but do want to be able to gauge depth, particularly in shallow waters, reasonably reliably. For simplicity of installation, I want to use a transom mounted transducer, but am uncertain whether I should go for a dedicated depth sounder (Nasa Target 2 or similar), or a Fish Finder (such as the Garmin 90 or 140).

Obviously the Fish Finder will give a broader picture of the bottom terrain, but am concerned as to whether it will be reliably accurate in shallow waters (under 1.5m), even at low speeds.

Which would you fit?
__________________
NSS is offline   Reply With Quote
Old 18 December 2009, 08:50   #2
Member
 
Country: UK - England
Town: Dorset & Hants
Boat name: Streaker/Orange
Make: Avon/Ribcraft
Length: 4m +
Engine: 50Yam/25 Mariner
Join Date: Apr 2007
Posts: 5,551
I'd go depth sounder - just one number to think about instead of pretty pictures of stuff that your brain needs to think about .

I know that when the number get close to 0 I am about to hit the bottom- simple!

However ..... if you got a fish finder rigged up it may be of use either if you wanted to fish , or if you came to sell to a fisherman type !
__________________

__________________
PeterM is offline   Reply With Quote
Old 18 December 2009, 09:05   #3
NSS
RIBnet supporter
 
NSS's Avatar
 
Country: UK - England
Town: Southampton
Boat name: cariboo too
Make: WB Generation 430
Length: 4m +
Engine: Honda BF50
Join Date: Oct 2009
Posts: 501
Thanks for that. As I said, really not concerned about finding fish, but was leaning toward the fishfinder simply for the 'picture' of the bottom terrain in the immediate vicinity. My concern was/is that fishfinders may not provide reliable depth measuring in very shallow waters and had presumed thaat may be why a relatively simple (in terms of the info displayed) dedicated depth sounder costs as much or more than an entry level fishfinder (desspite the FF displaying more complex info).
__________________
NSS is offline   Reply With Quote
Old 18 December 2009, 10:57   #4
Member
 
Country: UK - Scotland
Boat name: Wildheart
Make: Humber/Delta Seasafe
Length: 5m +
Engine: Merc 60 Clamshell
MMSI: 235068449
Join Date: Apr 2007
Posts: 4,610
I've been considering this for a while - mostly because I have a really tiny console, so a relatively big fishfinder display eats into the space........

Someone (Might be Lowrance or Raymarine, can't remember off the top of my head) does a "depth" with a "trend-ometer" up the side of the display, which gives an at a glance idea of whether it's getitng shallower or deeper and how fast it's happening. Again one less thing to think about.
__________________
9D280 is offline   Reply With Quote
Old 18 December 2009, 11:00   #5
Member
 
Country: UK - England
Town: Dorset & Hants
Boat name: Streaker/Orange
Make: Avon/Ribcraft
Length: 4m +
Engine: 50Yam/25 Mariner
Join Date: Apr 2007
Posts: 5,551
Surely the 'trendometer' is the thing stuck just above most peoples neck ? I can get down to 3 inches with reasonable accuracy - which I then ignore as usually its just mud.

eg ( and I quote) 'Blimey its started to get shallow................... bugger I've hit the bottom'
__________________
PeterM is offline   Reply With Quote
Old 18 December 2009, 11:24   #6
Member
 
Channel Ribs's Avatar
 
Country: UK - Channel Islands
Town: Alderney
Length: no boat
Join Date: Sep 2006
Posts: 3,047
Fishfinder every time, make yourself feel better and call it sonar.

They are the same money and you get way more information, installation is the same too.
__________________
Channel Ribs is offline   Reply With Quote
Old 18 December 2009, 12:08   #7
Member
 
Country: USA
Town: Oakland CA
Length: 3m +
Join Date: Feb 2005
Posts: 6,653
Quote:
Originally Posted by NSS View Post
but was leaning toward the fishfinder simply for the 'picture' of the bottom terrain in the immediate vicinity. My concern was/is that fishfinders may not provide reliable depth measuring in very shallow waters
They provide quite accurate info in shallow water, assuming they're set up reasonably well.

My Lowrance reads from somewhere around 200 fsw (it's a high freq unit) to as little as a half a foot below the transducer (though probably not at speed - that skinny and I'm creeping.)

jky
__________________
jyasaki is offline   Reply With Quote
Old 18 December 2009, 13:42   #8
Member
 
chewy's Avatar
 
Country: UK - England
Town: Up Norf
Make: Avon SR4,Tremlett 23
Length: 4m +
Engine: Yam 55, Volvo 200
Join Date: Apr 2007
Posts: 5,217
Fishfinder, cheap enough plus on my Garmin it also tells you battery voltage.
__________________
chewy is offline   Reply With Quote
Old 18 December 2009, 18:53   #9
Member
 
Hightower's Avatar
 
Country: UK - England
Town: Fareham
Length: 6m +
Join Date: Sep 2003
Posts: 7,855
Fishfinder for me too. I find that you don't have to keep too close an eye on it as the graphics for the bottom terrain will tell you if your getting shallow or deeper without constantly looking at the depth numbers.
__________________
Andy

Looks Slow but is Fast
Member of the ebay Blue RIB cover club.
Hightower is offline   Reply With Quote
Old 19 December 2009, 06:30   #10
NSS
RIBnet supporter
 
NSS's Avatar
 
Country: UK - England
Town: Southampton
Boat name: cariboo too
Make: WB Generation 430
Length: 4m +
Engine: Honda BF50
Join Date: Oct 2009
Posts: 501
Thanks all. Seems the general consensus is to go with the fishfinder - so long as there's enough space on the console.
__________________
NSS is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 20:10.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.