Reply
 
Thread Tools Search this Thread
 
Old 06 May 2004, 11:43   #1
Member
 
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
twin sounders?

I am considering fitting a second sounder to my RIB. By Fitting a GSD 20 displaying via the plotter I could have dual 200kHz and a 50KHz sounders rather than a dual frequency single sounder.
Garmin say as long as they sounders are operating on different frequancies they won't interfere with each other and the idea is to have a coarse wide pattern 50kHz with a narrow beam high detail 200kHz picture. This is for wreck finding and shotting for diving.
The questions are-
1. Has anybody tried this and it worked?, no interference etc and good clear pictures?
2. If I put a through hull transducer in the rear well on the centreline behind the engine will I get turbulence from the hull edge screwing up the picture?
3. Is it worthwhile and is the detail on the screen better and worth spending the money on?
__________________

__________________
http://www.argylldiving.btinternet.co.uk
Rupert Bear is offline   Reply With Quote
Old 06 May 2004, 13:43   #2
Member
 
Country: UK - England
Town: Margate / Ramsgate
Boat name: Ballistic
Make: Ballistic
Length: 7m +
Engine: Yam HPDI 250
Join Date: Feb 2002
Posts: 2,835
I don't dive (therefore look for wrecks) so i can't help there but I did have two sounders fitted to my last RIB, they were different frequencies and worked fine together. When i fitted a 3rd (not because i needed a 3rd, it had a water temp and speed sensor) it interfeared with one of the others - it was only 20KHz different.

HTH
__________________

__________________
Daniel is offline   Reply With Quote
Old 06 May 2004, 14:11   #3
Member
 
Country: UK - England
Town: Beverley
Boat name: TBA
Make: Unknown
Length: 6m +
Engine: Tohatsu 8Hp
Join Date: Apr 2004
Posts: 257
Don'tmost dual frequency sets use both frequencies simultaneously? I may be wrong but I though this was how they worked.
__________________
Roohairy

"I'm not lost, I'm exploring...."
roohairy is offline   Reply With Quote
Old 06 May 2004, 14:43   #4
Member
 
Richard B's Avatar
 
Country: UK - England
Town: Devon
Boat name: White Ice
Make: Ranieri
Length: 5m +
Engine: Suzuki 115hp
Join Date: Jul 2002
Posts: 5,015
Roohairy, that's what I thought too. I've just had a dig around on Humminbird's web site and they use dual frequency 200/83 kHz so probably worth some research on the manufacturer's web sites?
Richard B is offline   Reply With Quote
Old 06 May 2004, 14:46   #5
Member
 
Country: UK - England
Town: Margate / Ramsgate
Boat name: Ballistic
Make: Ballistic
Length: 7m +
Engine: Yam HPDI 250
Join Date: Feb 2002
Posts: 2,835
What is very worth considering is make and peoples experiences with that make - how fast do you go and want to read the bottom at?

I've said this many times before, nothing to date has bettered my Eagle unit(s) for high speed depth readings.

I've now got a garmin unit and it's less efective than the prop at finding the bottom

I spoke to some guys at the weekend with a Hummingbird who were having similar problmes to me.

What make are you running at the moment / considering??
__________________
Daniel is offline   Reply With Quote
Old 06 May 2004, 16:10   #6
Member
 
Country: Ireland
Town: Carigaline/Baltimore
Boat name: XS-600
Make: XS-Ribs
Length: 6m +
Engine: Merc Optimax 150 XL
Join Date: Feb 2004
Posts: 682
Gotta agree with Daniel on the eagle for high speed readings. I've got a Lowrance LMS320 dual frequency sounder (same as the eagle Seacharter 320DF) and it has been flawless for depth readings at high speed. Very good for fishing too!!
__________________
Steve G
If In Doubt, Go Flat Out!!
swginn is offline   Reply With Quote
Old 07 May 2004, 19:23   #7
Member
 
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
Quote:
Originally Posted by roohairy
Don'tmost dual frequency sets use both frequencies simultaneously? I may be wrong but I though this was how they worked.
On most sets you can have one, the other or both frequencies at the same time.
__________________

__________________
http://www.argylldiving.btinternet.co.uk
Rupert Bear 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 23:38.


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