Question about Garmin GPSMAP 440 Chartplotter GPS with Ocean Shoreline Info
I have a Garmin 440 on my boat. It works fine as I'm going slowly through a no wake zone (5 knots) but when I accelerate past 2,000 rpm or 15 knots, the readout blinks at the last depth and it appears the thing is not tracking with the boat. Any suggestions?
Generally, that indicates air bubbles in the water under the transducer. If you have a transom-mount transducer, make sure the bottom surface is level or angled slightly down. If you have a thru-hull, make sure your bottom is fairly clean in that area.
Posted on Jun 18, 2009
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