Garmin GPSMAP 296 Pilot's Manual page 129

• 2X Split—shows two reduced-size sonar pictures at the same
time. The right half of the display screen shows the complete
sonar picture at its original scale. The left half shows a portion
of the original picture at 1/2 depth scale.
• 2X Zoom—displays the 2X zoomed picture on the full screen.
• 4X Split—shows two reduced pictures, the right at the
original depth scale and the left at 1/4 the original depth scale.
• 4X Zoom—displays the 4X zoomed picture on the full screen.
• 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 returns from the bottom up on
the full screen.
TIP: Quickly zoom in and out of the Sonar display by pressing
the IN and OUT keys. Deactivate the zoom function 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 display is 2X or 4X split, only
the zoomed portion on the left side of the display is affected by the
change. If the display is Bottom Split or Bottom Lock, Span adjusts
how far off the bottom the unit displays data.
GPSMAP 296 Pilot's Guide
S
ETTING UP AND
Gain—allows you to control the sensitivity of the unit's receiver,
which provides flexibility in what is displayed. To see more detail,
increase the receiver sensitivity by selecting a higher gain. If there is
too much detail or if the screen is cluttered, select a lower gain.
Target Level—adjusts which colors are used to display sonar
information. A Color Bar appears on the right side of the screen as
you adjust this setting. A higher percentage results in more strong-
signaled colors displayed on the sonar display. A lower percentage
results in more weaker-signaled colors displayed on the sonar
display. This setting does not increase or decrease the unit Gain.
Whiteline—controls how the unit displays information about the
bottom type (hard or soft). With the Whiteline Off, the bottom return
displays as red. Set Whiteline at Normal or 1–100% to determine
bottom hardness. See page 128
Frequency—allows you to choose a transducer frequency.
Frequency refers to the "pitch" of the sound that the transducer
sends and receives.
Depth Line—adds a horizontal depth line across the display that is
used to measure the depth of underwater objects. The depth of the
line appears in a box on the right side of the line. Press Up or Down
on the Rocker key to move the line on the sonar display.
U S > U S
SING ONAR SING THE ONAR
for more information.
P
AGE
121