Raymarine Marine GPS System - Manual (Page 106)

Advanced Navigator Functions
5-15
Note: On short range scales, do not set the Sea Clutter
control so high that all clutter is removed, since this
could prevent you from seeing close-echo targets.
The SEA control can be set to Auto-Harbor (default), Auto-Offshore
or Manual mode. In Auto-Offshore mode, the Pathfinder Plus Radar
optimizes its settings to account for the effects of sea clutter. In
harbors or close proximity to land different auto settings may be
necessary to cater for the effects of land clutter. To avoid losing small
targets it is therefore advisable to set the Sea control to Auto-Harbor
mode. Alternatively, set both Sea and Gain to Manual mode then
adjust the settings to ensure that all close small targets are visible.
Note: Because the SEA control affects the gain, you may
need to manually readjust it if you manually change
the Gain setting.
To adjust Sea Clutter control:
1. Select a range appropriate to the adjustment you want.
2. From the Pathfinder Panel, click the GAIN button.
The Gain buttons are displayed.
or
Click the right mouse button and select
View/Control
Panel . The Control Panel appears.
3. Click the SEA button. The button toggles the control
between Auto-Harbor, Auto-Offshore and Manual mode.
4. Select Manual mode to display the arrow control keys.
Use the up/down arrows to increase/decrease the Manual
Sea Clutter setting. The image on the screen changes as
change the value, so that you can see the effect of your
adjustment. Important: Because the changes to the
settings are made immediately, you cannot revert to the
previous setting by clicking
CLEAR .
5. When you have set the controls to the levels you require,
click ENTER , CLEAR , or BACK to return to the default
menu level of the Functionbar.