Garmin GPSMAP 182C User Manual

Page 87

GPSMAP 182/182C Owner’s Manual

SING

ONAR

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 appears.

When selected, 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 deselected 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.

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.

Target Level—adjusts how dark or

light a return (or target) is displayed

appears on the right side of the screen

as you adjust this setting. The higher

the percentage, the darker the return

appears. This setting does not increase

or decrease the unit gain.

View Adjustment

Gain Adjustment

Target Level Selection