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Using the Sounder Page (continued)
The area of strongest sonar return (whiteline) is
displayed as light and dark checkering. Typically, the
bottom will be the primary source of the whiteline. A
thin whiteline indicates a softer bottom while a thicker
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 significant objects lying on the bottom. Along
the left side of the screen (typically) is an adjustable
scale which shows the current display’s range of depth.
Range Modes
The GPS 125 Sounder uses two range modes: auto
and manual. ‘Auto’ displays the most information pos-
sible while continuously displaying the bottom.
‘Manual’ lets you select the displayed range. You may
switch between auto and manual modes by using the
arrow 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 depth
range is displayed on the depth scale at the left side
of 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 repeated
beep sounds. ‘Auto’ will be shown in the range field at
the top left corner of the screen, and press
F
.
Underwater waypoints
The underwater waypoint feature marks a way-
point’s position and its depth. This makes it easier to
find and use an object such as a stump for a future
fishing location. For instructions on marking an under-
water waypoint, see pg. 38.
Sounder Zoom
The sounder zoom function allows you to see the
current display picture at 2 times (2X) or 4 times (4X)
magnification. 2X means that the screen displayed will
now cover 1/2 the range you were originally viewing in
twice the detail, and 4X shows 1/4 the original range at
four times the detail. Because less area is being shown
(in a zoom screen) objects can be seen in greater detail.
15
GARMIN’s exclusive See-
Thru technology will allow
you to distinguish sonar tar-
gets from bottom clutter and
thermoclines.
GETTING
STARTED
Sounder Page,
Range Modes, &
Sounder Zoom
Use the target cursor to
mark the desired underwa-
ter location.
Note: The bearing and
range shown are to the cur-
sor’s location from your pre-
sent position.
125 Man Rev B 7/23/98 11:47 AM Page 15