Garmin GPSMAP 3005C - Marine GPS Receiver Owner's Manual

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Contents

GPSMAP 3005C Owner’s Manual usIng sonAr > sonAr tAb• Depth line—adds a horizontal depth line across the screen that is used tomeasure the depth of underwater objects. The depth of the line appears onthe right side of the line. Press up or down on the ROCKER to control theposition of the line on the Sonar Page. To turn the Depth Line off, press theROCKER up until the setting bar is all the way at the top of the range andreads Off.Depth lneZoom—sets a screen zoom scale. The following settings are available:• Off—turns off the Zoom function.• 2x Zoom––displays the 2x zoomed picture.• 4x Zoom––displays the 4x zoomed picture.• Btm (Bottom) lock––displays the Bottom Lock (returns from thebottom up) picture. When using this setting, “BL” appears at the bottomof the screen.• Zoom View—available when you select a Zoom scale other than Off. Youcan use the Zoom View setting to change the viewing range of a zoomeddisplay. Auto follows the water bottom. If the display is Bottom lock, theSpan setting adjusts how far off the bottom the unit shows data.• Tools—controls the display of useful sonar tools. The following options areavailable:• A-scope—when you turn on A-scope, a vertical flasher bar appears onthe far-right side of the screen. This flasher displays structure andbottom returns much the same as the Flasher Page. The horizontal widthof the A-scope signal indicates the strength of the signal.• Color Bar—shows a gradient scale of the current Color Gain setting.• Temp Graph—appears only if you have a temperature-capabletransducer. This setting toggles the display of a temperature graph on oroff on the bottom of a Sonar Page, and it matches the scrolling data.• Setup—opens the Sonar tab.To adjust the range:On the Sonar Page, press the up RANGE key to decrease the range, orpress the down RANGE key to increase the range.The unit can be set to automatically track the bottom (Auto) or set to auser-specified depth range.Using the Pointer on the Sonar PageYou can use the pointer (arrow) to reference sonar items and mark underwaterwaypoints. This makes it easier to find and use an object, such as a stump, as afuture fishing location. When using this feature, the Sonar Page pauses. The depthcontinues to update while the display is paused, but the unit does not show anynew sonar data until the Sonar Page resumes scrolling. Discontinuity is possiblefrom where the sonar information stops and where it starts again.sonar