Garmin 178c sounder...?

[stumpbumpers]

Why can't I get it to show the sonar arches instead of the fish? Do I have the wrong transducer? I think I have the 200KHz, but I've been looking online(since I stay on hold for so long when I call Garmin) and I see that there is a 50/200KHz. Is this what I am missing?

[stumpjumper]

bumper,
I don't owe a garmin but on my eagle's you have to cut off all the fish id's, fish tracking, fish alarm, to see the arch's. Also may want to put it in the manual mode instead of auto. You may want to check the angle of the transduce and make sure its shooting straight down if its angled it will not show the complete arch. I'm sure there some folks that know way better than I but you might try these that I've found to help me.

[KINGFISHER]

I have jist purchased a Eagle 500C. the manual says that you must be moving for the arches to show. Otherwise you will see a flat line only. And you must have the Fish Id Off. I am not sure about the garmin but I would think that it works the same way.

[izzysfishin]

Turn off the fish ID, bumpers. And as KINGFISHER said the the slower ya go the longer the arch. The fish alarm drives me nuts also...izzy

[TAE73]

On page 38 it explain on how to change from fish symbols to fish arches.

38
Reference
Sonar Page Options
• Set Up Sonar — jumps to the Sonar tab of the Main Menu, which contains sonar configuration
settings that should not require frequent change. You may also press MENU twice from any
screen, then highlight the ‘Sonar’ tab using the ARROW KEYPAD. Press RIGHT on the ARROW
KEYPAD to access the selection fields. Each time the Setup Menu is accessed, the unit returns to
the last edited selection field.
To change a setting on the Sonar tab:
1. Using the ARROW KEYPAD, highlight the desired field and press ENTER and the available options
appear.
2. Highlight the desired setting and press ENTER.
3. Press QUIT to return to the Sonar Page or previous page.
Sonar Tab Options
Fish Symbols — allows you to determine how the graph displays underwater targets and background
information. If Fish Symbols are set to ‘Off’, the unit displays all of the available information
about the underwater environment. If a fish symbol is selected, the graph displays only the information
related to that symbol. Actual fish returns may not always appear as perfect arches (like in
simulator mode), due to the speed, fish orientation, and/or other conditions.
Water Type — since sound waves travel through ‘Fresh’ and ‘Salt’ water at different rates it is necessary
to select the ‘Water Type’ to ensure accurate readings on the unit.
Depth Number — controls the efficiency of the digital depth update rate. ’Fast Update’ updates
more quickly and is recommended for low-noise, deeper water (>50 ft.). ‘Auto’ is best for shallow
water or high noise areas, has a slower screen update and is best used if you travel a wide variety of
depths.
Resizing the Split Sonar Display
Double-Arrow
‘Size Split’ Menu
Options
Fish Symbols Off— All available information
is displayed.
Suspended targets displays as fish symbols.
Background information is displayed.
Same as above with the target depth attached.
Suspended targets display as fish symbols. No
background information is displayed.
Same as above with target depth attached.

[stumpbumpers]

Thanks guys, but I've done all that. The first thing I did when I couldn't do it myself, was believe it or not, I read the directions. A buddy of mine fumbled with it too. I sat on hold for twenty minutes, twice, with Garmin, before I finally hung up. I'll try it again later. Right now my batteries are toast. I gotta get them and then try it. I was hoping it was going to be the transducer not the unit. I've had it a year and a half, mostly used the fish on the screen since every time I went to change it I didn't have the book with me. Thanks guys.