Humminbird Side Imaging Forums

Side Imaging Forums => 997c SI, 998c SI & 999ci HD SI => Topic started by: mako9man2 on June 29, 2014, 01:29:47 PM

Title: How fast can your boat go and still detect bait/fish schools on 2D sonar?
Post by: mako9man2 on June 29, 2014, 01:29:47 PM

I have the 999 with seperate HDSI & 2D sonar transducers.  I know my SI won't work at planing speed but I get solid bottom readings and contours on my 2D.  I'd like to use that speed to more quickly find schools of bait fish.  To date I haven't seen any on my 2D screen but not sure if that is because I just haven't looked closely enough or if they just won't register at higher speed.

How should I adjust/set my 2D sonar for high speed detection and what is the fastest speed I can reasonably expect to see these schools? 

Title: Re: How fast can your boat go and still detect bait/fish schools on 2D sonar?
Post by: 5eyes on June 29, 2014, 01:39:35 PM

i have a 96 lund pro-v, 898c si...i get good 2d and si to 37-39 mph gps...it IS all about TD placement and adjustment...YMMV   5

Title: Re: How fast can your boat go and still detect bait/fish schools on 2D sonar?
Post by: Humminbird_Greg on June 30, 2014, 02:19:04 PM

Fastest I remember seeing baitfish was on an older Ranger 360V we had here at Humminbird.  It ran really nice at 60mph and would track the bottom well on smooth water.  We could see large schools of shad at those speeds.

It is all about transducer placement or more accurately: how the water flows across the face of your 2D transducer.  There are really no special setup requirements for this.