Garmin Fishfinder 160C Owner's Manual

Also see for Fishfinder 160C: Owner's manual Owner's manual Declaration of conformity Specification

Garmin Fishfinder 160C Owner's Manual Manual pdf 26 page image

22 Fishfinder 160C Owner’s ManualAPPENDIX > TRANSDUCER COVERAGE AND UNDERSTANDING THE GRAPHTransducer CoverageUnderstanding Transducer CoverageThe bottom area covered by the transmitted sound waves isdetermined by the beam width of the transducer, and the waterdepth. The Fishfinder 160C can transmit either a Narrow or Widebeam. The Narrow beam provides crisp bottom and structure detail,but the coverage area is limited. As shown in the illustration below,at a 30 foot depth the Narrow beam covers the area of a 6-footcircle. The Wide beam covers a much larger area, but with someloss of bottom and structure detail. As illustrated below, at a 30-footdepth the Wide beam covers the area of a 20-foot circle.��Understanding the GraphIt is important to understand that the unit does not display a 3-Drepresentation of the underwater environment. The unit can displaymultiple things at the same time, but cannot determine where thereturn originated—only when it was received.Examples 1 and 2 provide a look at the underwater world from atop view, and illustrate how these views would be displayed on thegraph. On both graphs it appears the fish and tree are side by sideas shown in Example 1. However, when we look at Example 2, wesee that the fish can be several feet from the tree. It is importantto remember that the Fishfinder cannot determine where in thecoverage area the tree or fish are, only that the returns were receivedat the indicated depths in the same time frame.Example 1BranchesFishExample 2FishBranchesWide Beam Narrow Beam