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[CA] CP370, TM258
02-22-18, 04:19 PM
Post: #2
RE: [CA] CP370, TM258
Welcome to the Raymarine Forum Doublecabin,

The symptoms which you have identified may well occur when the flow of water passing beneath the face of a fishfinder transducer becomes aerated such as can often occur when a vessel operates at planing speeds. Of the three transducer mounting styles (Thru-hull, In-hull, and Transom-mounted), the transom mounted transducers are typically most susceptible to aeration at planing speeds. Please click here to view a FAQ addressing this subject. Should aeration cause the fishfinder to loose bottom, then the sounder will hunt in an attempt to reacquire bottom. Should the sounder not reacquire bottom shortly after the vessel has stop or is operating at trolling speeds, then it would be recommended that the operator abandon automatic depth ranging and then manually configure the depth range to be one range increment deeper than the charted depth (examine the spot soundings and/or depth contours within the Chart application) at the vessel's location. Once the sounder has reacquired bottom, then the sounder may once again be configured to automatic depth ranging.
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[CA] CP370, TM258 - Doublecabin - 02-19-18, 08:03 AM
RE: [CA] CP370, TM258 - Chuck - Raymarine - Moderator - 02-22-18 04:19 PM

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