Author Topic: Best settings for saltwater 12'-50'  (Read 5901 times)

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Offline exudedude

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Best settings for saltwater 12'-50'
« on: March 03, 2010, 07:34:18 PM »
I just got the upgrade and was wondering what the opinions were for settings in saltwater from 12-50 ft?

Thanks....


Offline sonar2000

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Re: Best settings for saltwater 12'-50'
« Reply #1 on: March 04, 2010, 08:43:19 AM »
Dude.  check several of the topics in the forum  997 si initial setings.  this is from one by Rgecy.  Use the search box in the upper right.   
Transducer should be set to Hi-Def.  But could be set to others if you purchased them.
- Hi Def Sidescan is the 455/800khz / 83/200khz standard transducer that comes with the 997,998,898, and 1197
- Compact Sidescan is the 455khz / 83/200khz standard transducer that comes with the 797 and 798
- Sidescan is the older 262/455khz SI / 50/200khz transducer that was made for the 981 and 987.

DI Beam Width - Now I would say leave it on Wide.  Basically your seeing everything with that setting.

2D - I would turn the 83khz off.  It is really not needed in shallow water and only adds to recording size and decreases ping rate. 

Dont know how much you use the navigation screens but I would have one of my presets for this.  Remeber, once you get used to the order, you can hit View to move a screen ahead or exit to move a screen back.  So ones that are close will still be one button away.

I would also disable any views that you dont need.  I never use the Birds Eye Chart View (and a few others...) and have them turned off, so when I move through the views they dont take up extra button pushes and I can flip through quicker!

Chart Speed will be one of those settings that will need to be adjusted with boat speed.  Your best SI images will be between 3-5mph and chart speed at 4 would be fine.  It would be better if you match your Chart Speed to Boat Speed, so at 3 mph, set to 3 and 5 mph set to 5.

I would also set my Max Depth to something reasonable for your area.  I pretty much stay in waters less than 150' deep and set my Max Depth to this.  If you lose bottom, it will keep the unit from slowing down the ping rate to almost nothing trying to listen longer thinking its in deeper water!  Can affect Recordings especially if this happens.

As for area of coverage, I generally tell people, if you are looking for fish, the smaller the better.  I conside the optimal setting to be 2.5-3 times your depth.  Especially if you are running 800khz.  At 455khz, you can certainly move out farther since the beam looks more towards the surface than the 800khz.

Well, thats all I can think of for now!

Robert

Offline mrj9600

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Re: Best settings for saltwater 12'-50'
« Reply #2 on: March 04, 2010, 09:23:42 AM »
Hi
Now when this topic is open (again) I actually have two questions, that I have not found the answer for.

In the Sonar menu, there is a 'Water Type' setting with options ('Fresh', 'Salt (shallow)', 'Salt (deep)'). What does this setting do ? and when should I use Salt (shallow) vs. Salt (deep) ?

Another question is: Of all the settings that somehow affect the image quality and/or behaviour of a recording (Frequencies, Max depth, sensitivity, etc.). Which ones directly affect the sonar return and is therefore irreversible, and which ones are post-processing settings that can be changed when reviewing a recording ?

/Martin

Offline Humminbird_Greg

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Re: Best settings for saltwater 12'-50'
« Reply #3 on: March 04, 2010, 06:50:26 PM »
Martin,
The Water Type menu changes the algorithm used to calculate water depth as well as changes some of the filter settings for things like surface clutter and the criteria that is used in assigning the different Fish ID Symbol sizes.

Not sure what the official reply is for the Salt (shallow) and Salt (deep ) settings but I would bet this changes by location since the salinity content and amount of surface clutter would change as well.  As long as the unit is tracking the bottom well I would leave it on the Salt (deep) setting.

I think that all of the settings are post-processing but one of the Software guys would have to confirm that to know for sure.

Greg Walters at Humminbird
gwalters@johnsonoutdoors.com


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