Thanks, that's a relief.
I'll check the manual to read up about the temp. line.
But losing the bottom is a new deal, that just started in the last couple of trips.
My 997C is on my console, and the tranducer is mounted under the transom, up on the face of the lowest hull step, so it's protected when I'm up on plane, with only the bottom half of the tranducer exposed to the water flowing past the hull. Jordan at Anglers Marine installed it.
That used to happen to my X15 when I had my other Lowrance unit on the bow on, and they cross read.
When I got the 997, I put it on the console, and moved the X15 to the bow.
I have an HD5 on the bow now, but the two units have never cross read. In fact, when I'm fishing alone, I turn the ram mounted 997 around so I can read both units while I'm on the bow fishing, and never have any interference problems.
But this is happening when the TM isn't deployed, when I'm motoring at 5-7mph, graphing structure and looking for bait balls. It usually happens when I first pull up on a spot and come off plane over deep water, or when I've idled into a cove and am graphing. If the water is deep, 50+, it happens. The digital readout is 1', like when I'm on plane, and the graph only shows the top of the water column. After it searches, it sometimes bounces back and forth from different depth readouts, until it finally locks down at the real depth.
Does that sound like anything you recognize?
I know, I know, operator error, of course!
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