Question about Garmin Gpsmap 440s Dual Frequency Combo

# New GPSMap 440 S Depth flashing

Unit flashes depth reading (I swear it is deeper than 2.2 feet!! it was more like 900) while drifting and while running at different speeds, does not always do it but when it does start it seems like it can take up to 10 minutes to clear and start reading correctly again.

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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.

Posted on Mar 13, 2010

Hi there,
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Posted on Jan 02, 2017

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## Related Questions:

How it Works

### Stone and Mulch Calculators

As an example, let's use 500 square feet to be mulched at a
3" depth.
1. First, the depth must be converted to feet. To convert inches to feet, simply divide inches by 12, the number of inches in a foot.

So for our example: 3 inches divided by 12 equals a 0.25 foot depth.
2. Now that we have the depth in feet, we can multiply the depth by the area.

So for our example: 0.25 foot depth times 500 square feet equals 125 cubic feet.
3. If you are calculating 0.5, 2, or 3, cubic foot bags, simply divide 125 cubic feet by the size of the bag.

So for our example: if we are using 2 cubic foot bags, we can divide 125 cubic feet by 2 which equals 62.5 bags.
4. If you are calculating cubic yards, we need to convert 125 cubic feet to cubic yards by dividing by 27. One cubic yard is equal to 27 cubic feet, see the diagram below.

So for our example: 125 cubic feet divided by 27 equals 4.63 cubic yards.

• 1 inch equals 0.08333 feet
• 1.5 inches equals 0.125 feet
• 2 inc

Jun 29, 2016 | Office Equipment & Supplies

### Unit will show correct depth for a short time and then reset to 2.2 feet and stay at that reading for long periods of time!

I assume that when it resets to 2.2 feet that the readout is flashing. If so the it sounds like you have a bad transducer as the problem has been getting progressively worse.
The transducer needs to be replaced. Sounds like the sending crystal is fractured.

Aug 06, 2014 | Lowrance X135 Power Pro Sonar Without...

### Garmin troubleshooting

get a new transducer or make sure you are not in less than 10 feet of water

Jul 20, 2014 | Garmin Gpsmap 441s Dual Frequency Combo...

### I lose depth when moving

that's common with all depth finders when on plane you loose bottom lock when you slow down to stop does it start to work again if so you have no problem

Apr 22, 2013 | Garmin GPSMAP 541s

### I have a garmin gpsmap 440s that will only read sonar depths a no wake speed. When I increase speed much past this the depth number blinks but does not track or change until I slow back down to idle again....

Sounds like the transducer is installed at the wrong angle or in such a way that it is getting a lot of air from something on the hull. If it is a transom mount, check that it is angled correctly and not too close to the motor or aft of some kind of thru-hull fitting that will cause turbulence.

Aug 18, 2009 | Garmin GPSMAP 440 Chartplotter GPS with...

### 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...

### Depth sounder problem

If the transducer is mounted off of level, an error is introduced due to angle. It is a fixed percent offset, say 10%. so 10 feet reads 11 and 100 reads 110. There is an offset function to read depth below ducer, depth below keel, and depth below waterline, but these are fixed amounts in feet, not a percentage. Look at the transducer when it is operating, boat angle considered.

Jun 18, 2008 | Furuno GP1650DF GPS Receiver

### Depth display

Oct 02, 2007 | Garmin GPSMAP 498

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