Garmin SOUNDER 125 Owner's Manual & Reference

Contents

Using the Sounder Page (continued)The area of strongest sonar return (whiteline) isdisplayed as light and dark checkering. Typically, thebottom will be the primary source of the whiteline. Athin whiteline indicates a softer bottom while a thickerwhiteline shows a harder bottom. A black line is usedto show the point where water meets the whiteline.This black line will follow the bottom contour, alongwith any significant objects lying on the bottom. Alongthe left side of the screen (typically) is an adjustablescale which shows the current display’s range of depth.Range ModesThe GPS 125 Sounder uses two range modes: autoand manual. ‘Auto’ displays the most information pos-sible while continuously displaying the bottom.‘Manual’ lets you select the displayed range. You mayswitch between auto and manual modes by using thearrow keypad or by using the sounder setup menu.To switch from auto to manual mode:1. Press the U or D keys until the desired depthrange is displayed on the depth scale at the left sideof the page.2. Press F to confirm the selected range.To switch from manual to auto mode:1. Press the arrow keypad up or down until a repeatedbeep sounds. ‘Auto’ will be shown in the range field atthe top left corner of the screen, and press F.Underwater waypointsThe underwater waypoint feature marks a way-point’s position and its depth. This makes it easier tofind and use an object such as a stump for a futurefishing location. For instructions on marking an under-water waypoint, see pg. 38.Sounder ZoomThe sounder zoom function allows you to see thecurrent display picture at 2 times (2X) or 4 times (4X)magnification. 2X means that the screen displayed willnow cover 1/2 the range you were originally viewing intwice the detail, and 4X shows 1/4 the original range atfour times the detail. Because less area is being shown(in a zoom screen) objects can be seen in greater detail.15GARMIN’s exclusive See-Thru technology will allowyou to distinguish sonar tar-gets from bottom clutter andthermoclines.GETTINGSTARTEDSounder Page,Range Modes, &Sounder ZoomUse the target cursor tomark the desired underwa-ter location.Note: The bearing andrange shown are to the cur-sor’s location from your pre-sent position.