Just bought a garmin 551, but am tempted to keep my old fashioned existing lowrance sounder, as well as having the sounder option on the gamin as the screen is apparently a bit small to use both at once. I am thinking of doing this with a view to getting a gamin sounder in the future when I have spare cash. This would obviously mean having two transducers on The transom. Would they interfere with each other?
I think i'll buy a boat*
*I think i'll buy a boat and then spend the rest of my life trying to afford to keep it