garmin 178c

[Fiction]

can anyone help me with a 178c garmin. i purchased anew boat which has the garmin in it . the gps works well but having afew issues with the sonar. when moving you can find what would seem a great bottom how ever when stopping the bottom appears just a flat area. very unusual have tried changing set up in many different ways but nothing seems to help it. If anyone has some advsie it would be apprecieatd Having just purchased the boat do not want th expense of a new unit.

thanks fiction /shane

[scuttlebutt]

when the boat is stationary the sounder display should be flat 'cause it is only returning what is directly under the boat.... or am I missing something?

[Noelm]

Yes, I think Scuttlebutt has it correct, or we need a bit more info, there is some very good Garmin stuff around these days, I am looking at it now for my boat.

[ozscott]

Mate - I have the 178C - unlike the Furuno 620 next to it it likes a nice deep transducer placement on my boat to read really well...about an inch below the transom. It is a fantastic GPS (even at its age its a gem - so easy to use and so many features still) and a very solid sounder (but does not compare to the 620). Mate have a good look at the instructions, place the transducer low, and get back to us if you still have problems (in the instructions for eg it will tell you how to specify the water type as salt...).

Cheers

[tunaticer]

I've got the 178c as well and it works flawlessly in both sounder and gps modes.
I suspect you are wanting to see moving screens when you are stationary, well if there is nothing changing under your boat you will get a flatline full stop.