Garmin 90/140 Owner's Manual

Also see for Fishfinder 140: Install guide Owner's manual Owner's manual Declaration of conformity Manual

Garmin 90/140 Owner's Manual Manual pdf 8 page image

2 Fishfinder 90/140 Owner’s ManualGETTING STARTED > U NDERSTANDING DUAL BEAM TRANSDUCER COVERAGEwave information, and then sends the information to theFishfinder. The Fishfinder displays the information on thescreen for you to see and interpret. The type of transducerand settings you choose determine how the information isshown on the screen.Understanding Dual Beam TransducerCoverageA dual beam transducer can transmit a narrow or a widebeam. The water area covered by the transmitted soundwaves is determined by the beam width of the transducerand the water depth. The narrow beam provides crisp detailof what is under your boat, and is helpful if you are fishingin deeper water where the beam covers more area (forexample, at a 30-foot depth, the narrow beam covers thearea of about a 7-foot circle).WideBeamNarrowBeamThe wide beam is more helpful in shallow water, becauseit gives you a much wider view of objects in the water,including areas beyond the sides of your boat. At a 30-footdepth, the wide beam covers the area of approximately a20-foot circle.