Garmin Fishfinder 100 Owner's Manual

Also see for Fishfinder 100: Specifications Owner's manual

Garmin Fishfinder 100 Owner's Manual Manual pdf 9 page image

1InstallationSelecting a TransducerTransducersThe transducer acts as the eyes and ears of your new sonar. Propertransducer selection and installation are critical to the operation of yourunit.The transducer transmits sound waves toward the bottom in a coneshape. The larger the cone angle the larger the coverage area at a givendepth. While it is good to see as large of an area as possible, it is best toselect a transducer that suits the water that you are on.A wide cone angle transducer works best in shallow water. The widecone angle provides a large coverage area, but at a decreased bottomresolution. In deeper water this can result in a large dead zone where fishcannot be seen.A narrow cone angle transducer is better suited to deep-waterinstallations. The narrow cone angle provides a smaller viewing area(compared to a wide cone angle transducer at the same depth) withimproved bottom resolution and a smaller dead zone.Included in the Optional Package is a 20° cone angle, temperaturesensing, transom mount transducer. This transducer provides good all-around performance. A variety of optional transducers are available fromyour local dealer or GARMIN.XXdead zonefish not seenWide cone angleNarrow cone angle