Garmin GPSMAP 168 Sounder User Manual

Page 25

Getting Started

Sonar Page

The Sonar Page lets you use the GPSMAP 168 Sounder as a ﬁ shﬁ nder. The top of the screen

contains any of 27 selectable data ﬁ eld options, while the middle of the page contains a right-to-left
moving sonar image of the water beneath your boat. (Note: Items appear on the screen as they pass
under your transducer. Those objects appearing on the right side of the screen are closer to you
than those on the left.) Fish are displayed as a darkened arch or a ﬁ sh icon in three different sizes.
Thermoclines (layers of water separating warmer water above from cooler water below) are shown
as shades of gray.

The area of strongest sonar return (or whiteline) is displayed as solid gray. Typically, the bottom

will be the primary source of the whiteline. A thin whiteline indicates a softer bottom while a thick
whiteline shows a harder bottom. A black line is used to show the point where water meets the
whiteline. This black line will follow the bottom contour, along with any signiﬁ cant objects lying on
the bottom. Along the right side of the screen is an adjustable scale which reﬂ ects the depth of the
area being displayed. If the unit does not detect a transducer attached to the unit, a “Sonar Turned
Off” message will appear across the top of the Sonar Page. More on the Sonar Page may be found
on pages 38-44.

The GPSMAP 168 Sounder uses two range modes: auto and manual. Auto mode displays the

most information possible while continuously showing the bottom. Manual mode lets you select the
displayed depth. These and other Sonar Page functions are controlled from the adjustment bar.

To switch from auto to manual mode:

1. With the ‘Range’ ﬁ eld highlighted, press the ARROW KEYPAD UP or DOWN until the desired

depth range is displayed on the adjustment bar or shows on the depth scale in the lower right
side of the page.

2. Press ENTER/MARK or press LEFT or RIGHT on the ARROW KEYPAD to conﬁ rm the selected

range.

To switch from manual to auto mode:

1. With the ‘Range’ ﬁ eld highlighted, press the ARROW KEYPAD UP or DOWN until the selection

arrow points to ‘Auto’ or ‘Auto’ is displayed on the adjustment bar.

2. Press ENTER/MARK or press LEFT or RIGHT on the ARROW KEYPAD.

Depth Range Adjustment

Current
Setting

Sonar Page

Data Fields

Depth
Line

Depth
Scale

Flasher

Adjustment
Bar

Fish Arch

Bottom

Whiteline

Thermocline

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