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Wrong depth reading

Says water is deeper than it is

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When we are deep water (500 ft or deeper) the fish finder will display 3.5-10 ft. and won't show the fish or shows tons of fish. Are we able to set the depth that we would like to see eg: if we are...


Im not familiar with your particular unit but you should be using a low frequency transducer for water over 500'; something like a 50 kHz transducer or a dual frequency transducer like a 50/200kHz for detail with the high freq. but increased depth range on the lower frequency. As far as setting it to 250 ft, you should be able to use the range feature and adjust the maximum to 250'. typically the factory default is automatic so it will caonstantly adjust the range based on the maximum current depth.

May 22, 2011 | Standard Horizon Standard Ff520 Fish...

1 Answer

In water deeper than 400-500ft works erratically showing depths of 0 -20 60 -114 etc. is there something i need to set for deeper water


Try going into the menu and restoing the defaults just to make sure that are not any incorrect settings. This will restore the setting bact to the factory settings. If this does not correct your problem you can contact out customer service group and they should be able to trouble shoot your problem. Our number is 800-633-1468.

Joby from Humminbird

Jan 01, 2011 | Humminbird FISHFINDER 597CI COMBINATION ()

3 Answers

My depth finder loses its depth reading at about


You need to set the transducer lower. When at speed, the hull of the ship raises up out of the water and hence your transducer is probably not deep enough at these times to give a proper reading.

Jan 21, 2010 | Humminbird Boating

1 Answer

My fishfinder will not continue to read shallow depths as well as in shallow depths when drifting and occasionally running across the water. My unit is a lowrance 522c color gps/fishfinder.


Hello. Your observation is spot on and it is actually a characteristic that is always true when using sonar. Yes, your Lowrance uses the same sonar as a nuclear powered submarine does. The two factors you focus on, water depth and boat speed are perhaps, the two biggest factors when it comes to the quality of the fishfinder. The boat's engine should be in gear at an idle or just above. Experiment with your boat to find the best throttle location for good arches. Usually, a slow trolling speed works best. The depth of the fish can determine if the fish will arch on the screen. If the fish is in shallow water, the fish is not in the cone angle very long, making it difficult to show an arch. Typically, the deeper the fish, the easier it is to show an arch.
If you would like a complete tutorial on Lowrance sonar, go to this link. Enjoy. http://www.lowrance.com/Support/Tips-and-Tutorials/Sonar-Tutorial/

Nov 20, 2009 | Sport & Outdoor - Others

1 Answer

My furuno depth finder gives me crazy depth readings after i go over 10knots..whats the problem?


Turbulence on the transducer is almost certain. If transom mounted, **** it slightly deeper aft and ensure that the leading edge is not exposed. If through hull, call me 847-746-0100

Nov 03, 2009 | Furuno 1850WF Gps Fish Finder Combo...

1 Answer

Loses the depth after around 60 feet.


Is the transducer face clean? Fouling and barnacles can cause poor depth readings. Also, a low power output from transmitter or poor sensitivity of the receiver (both internal), or a broken transducer cable connection (usually accompanied by heavy noise being painted on screen). With your ear in the water, fairly close to transducer (6-10 ft., you should hear a clear tick-tick-tick sound as it transmits on a medium depth range.. No power adjustment is available in the menus, but the unit does transmit at a slower rate, with wider (stronger) pulses on the deeper ranges.

Sep 14, 2009 | SI-TEX Sitex Cvs106lmkii Color Lcd With...

1 Answer

Eagle Cuda 168 has no display over 30 feet of water


Try good alakaline batterys(duracell or energizer)alot of those rechargables dont hold amperage and dont stay recharged long!!!! :)

Jul 05, 2009 | Eagle Cuda 242 Portable Fishfinder

1 Answer

New GPSMap 440 S Depth flashing


You need to visit the garmin site and download a software upgrade its free and should fix any glitches you may be experiencing with your unit.

Jul 01, 2009 | Garmin Gpsmap 440s Dual Frequency Combo

1 Answer

Eagle 640c Fish Finder dosen't read corectly.


I had the same problem and got the transducer changed. It now works perfectly. That could be the problem you are having... bad transducer.

May 17, 2009 | Eagle Intellimap 640c Marine GPS GPS...

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