mbweimar
Well-known member
Ok, I know this sounds silly. I've had my Lowrance Elite-7 HDI for going on 2 years now. I've logged many many hours at the helm staring at the screen, but I'm still confused about some things. First is the quality of my downscan imaging. It's not always this grainy, but while I'm anchored or slowly drifting I frequently get images like this:
Another thing is with broadband sonar, I never see arches that indicate fish. I've seen a few youtube videos of people using the same unit on the water and no shortage of arches when on top of fish. The pic below was taken last night under a bridge in the intracoastal waterway. Im fairly certain the blob on the bottom is a mom-calf pair of dolphins that I see feeding on ladyfish and mullet every night when I fish this spot. Anyway, note the blobs suspended off the bottom and the smaller returns above them. Looks like a school of fish, But no returns on the broadband. Here's an example:
Another shot taken a few hours later shows similar results. Big blob on downscan, big blob on broadband, with smaller blobs on broadband (I would assume are fish) not shown as arches. The interference you see is because the trolling motor was on. This also confuses me because I have only seen this interference a couple other times. My trolling motor is on a completely separate battery from the sonar.
Another thing is with broadband sonar, I never see arches that indicate fish. I've seen a few youtube videos of people using the same unit on the water and no shortage of arches when on top of fish. The pic below was taken last night under a bridge in the intracoastal waterway. Im fairly certain the blob on the bottom is a mom-calf pair of dolphins that I see feeding on ladyfish and mullet every night when I fish this spot. Anyway, note the blobs suspended off the bottom and the smaller returns above them. Looks like a school of fish, But no returns on the broadband. Here's an example:
Another shot taken a few hours later shows similar results. Big blob on downscan, big blob on broadband, with smaller blobs on broadband (I would assume are fish) not shown as arches. The interference you see is because the trolling motor was on. This also confuses me because I have only seen this interference a couple other times. My trolling motor is on a completely separate battery from the sonar.