Seeing hard bottom on the bottom machine?

[dogonenuts]

Outside of seeing actual rock formations on the bottom, how do you tell you are looking at hard bottom vs. sand on a black and white machine?

Thanks for the answers.

Nuts

[tin can]

Do you have the owners manual for your machine? There is usually a good explaination and illustrations in the manual. If you don't have the manual, most manufacturers have their manuals available on line.

[sundown]

A hard bottom returns a stronger signal than a soft bottom does..Consequently, a thin whiteline would indicate a softer bottom..A thicker whiteline would indicate a harder bottom.. At least this is what my Garmin does..If you cross a hump or rise on the bottom with a wide whiteline it may indicate the presence of a rock or some kind of obstruction on the bottom..

[dstockwell]

From the Garmin manual, but check your manual there should be something explaining how it looks.

[dogonenuts]

Nuts

[mjsigns]

Another easy way to see what rocks look like on your bottom machine would be to go down the Aucillia river and watch your bottom finder.......

[Frank Bradfield]

Even better, if you got some good #'s i'll dive an check'em for you !