Garmin GPSMap 498 Owner's Manual - Page 85

x Zoom, Zoom View, Bottom Lock, Tools, A-scope, Color Bar, Temperature Graph, Split When Zoomed

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Page 85 highlights

Zoom-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 returns from the bottom up. When using this setting, "BL" appears at the bottom of the screen. Zoom View-available when you select a Zoom scale other than Off. You can use the Zoom View setting to change the viewing range of a zoomed display. Auto follows the water bottom. If the display is set to Bottom Lock, the Span setting adjusts how far off the bottom the unit shows data. USING SONAR > SONAR TAB OPTIONS Tools-controls the display of useful sonar tools. The following options are available: • A-scope-when you turn on A-scope, a vertical flasher bar appears on the far-right side of the screen. This flasher displays structure and bottom returns much the same as the Flasher Page. The horizontal width of the A-scope signal indicates the strength of the signal. • Color Bar-shows a gradient scale of the current Color Gain setting. • Temperature Graph-appears only if you have a temperature-capable transducer. When on, this setting displays a temperature graph on the bottom of a Sonar Page that matches the scrolling data. Split When Zoomed-turns this option on or off. If you turn on Zoom, then this setting splits the screen. Swap Split-available on a split Sonar Page when you are using dual frequency. This switches on which side the frequencies appear. GPSMAP 392/398/492/498 Owner's Manual 77

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GPSMAP 392/398/492/498 Owner’s Manual
77
U
SING
S
ONAR
>
S
ONAR
T
AB
O
PTIONS
Zoom
—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 returns from the bottom up.
When using this setting, “BL” appears at the bottom of the
screen.
Zoom View
—available when you select a Zoom scale other than
Off
. You can use the Zoom View setting to change the viewing
range of a zoomed display.
Auto
follows the water bottom. If the
display is set to
Bottom Lock
, the Span setting adjusts how far off
the bottom the unit shows data.
Tools
—controls the display of useful sonar tools. The following
options are available:
•
A-scope
—when you turn on A-scope, a vertical flasher
bar appears on the far-right side of the screen. This flasher
displays structure and bottom returns much the same as the
Flasher Page. The horizontal width of the A-scope signal
indicates the strength of the signal.
•
Color Bar
—shows a gradient scale of the current Color
Gain setting.
•
Temperature Graph
—appears only if you have a
temperature-capable transducer. When on, this setting
displays a temperature graph on the bottom of a Sonar Page
that matches the scrolling data.
Split When Zoomed
—turns this option on or off. If you turn on
Zoom, then this setting splits the screen.
Swap Split
—available on a split Sonar Page when you are using
dual frequency. This switches on which side the frequencies appear.