HB shallow water discussion...
http://www.bbcboards.net/humminbird-image-interpretation/172536-humminbird-si-screen-captures-0-10-a.htmlThe issue in SI Range is not how far will it reach...but how small those echoes become as the SI Range is increased...
The farther the SI range...the more information has to be squashed to get it into the SI image...making everything in the image smaller...
Enviromental conditions, fish echo size, bottom composition, smaller echoes from farther SI Range settings...all play a part in being able to discern fish echoes from the rest of the echoes in the SI image...
Sometimes the variables (as mentioned above) allow the fish echoes to pop out on the SI image....
Sometimes the variables (as mentioned above) make it very difficult to pick out the fish echoes...
Rickie