Garmin GPSMAP 192C - Manual (Page 87)

GPSMAP 192C Owner’s Manual 81
U
SING
S
ONAR
> S
ONAR
P
AGE
• Btm (Bottom) Split—shows two reduced pictures; the right
at the original depth scale and the left showing sonar returns
from the bottom up. All target depths read as a distance from
the bottom.
• Btm (Bottom) Lock—displays only the Bottom Lock
picture (returns from the bottom up) on the full screen.
However, if Dual Frequency Display is set to Split, then a
50/200kHz split screen is displayed.
When activated, the zoomed picture becomes the Sonar page
display. Cycle through the sonar zoom display levels by pressing
the IN or OUT keys. The Zoom function can be deactivated by
pressing the OUT key until the No Zoom setting appears.
View/Span—available when a Zoom scale other than No Zoom is
selected. The View or Span setting is used to change the viewing
range of a zoomed display. If the Zoom is set to 2X split or 4X
split, only the zoomed portion on the left side of the screen is
affected by the change. If the Zoom is set to Bottom Split or
Bottom Lock, Span adjusts how far off the bottom the unit displays
data. In Zoom mode, you can control the view of the left side of the
split.
View Adjustment
Gain—controls the sensitivity of the unit’s receiver. This provides
some flexibility in what is seen on the display. To see more
detail, increase the receiver sensitivity by selecting a higher gain
percentage. If there is too much detail or if the screen is cluttered,
lowering the sensitivity can increase the clarity of the display.
Gain Adjustment