4.6 REDUCING SEA CLUTTER
Increasing the SEA CLUTTER control effectively diminishes the
radar's sensitivity. SEA CLUTTER should never be advanced to
the point where it obliterates all returns from waves, since this
setting could prevent the detection of nearby targets, especially
small wood/grp boats and yachts approaching head-on.
The SEA CLUTTER control is normally only used on the shorter ranges to
suppress the effect of sea clutter formed by breaking wave crests which the
radar "sees" as solid objects.
Press the J-DIAL until the SEA appears highlighted in the upper right corner of
the display. Rotate the J-DIAL clockwise, or counterclockwise to vary the sea
clutter control and thus control the strength of echo returns from the sea sur-
face. The on-screen bar indicates the selected level.
4.7 ADJUSTING RAIN CLUTTER
Press the J-DIAL until the RAIN appears highlighted at the upper right corner
of the display. Rotate the J-DIAL clockwise or counterclockwise, to vary the
level and thus control the strength of echoes returned from rain or snow. As you
rotate clockwise, the returned echoes will become narrower and the returns
from rain or snow will be reduced.
4.8 SETTING LCD CONTRAST
Press the CONT/DIM key, and then rotate the J-DIAL clockwise or counter-
clockwise to change the display contrast.
4.9 SETTING DIMMER
By pressing the CONT/DIM key, the back light for the LCD and the panel
illumination can be varied in intensity. This function has only the two settings
"ON" and "OFF".