How Can I Get The Best Picture; How Do I Use The Gain Functions - Raymarine C-Series Reference Manual

Chapter 5: Using the Radar
PRESENTATION
To change the EBL reference:
1. Press PRESENTATION.
2. Toggle EBL REFERENCE to M/T. Dependant on the equipment connected, the EBL
bearings will now be expressed as either 'T' (True) or 'M' (Magnetic) on both the
radar screen EBL label and on the ADJUST EBL soft key.

5.6 How can I get the best picture?

You can improve the quality of the radar picture by using:
• The GAIN soft key and associated controls - Sea, Gain, Tune, FTC and Rain.
• The TARGET soft key and associated controls - Interference Rejection, Expansion,
Wakes.

How do I use the GAIN functions?

GAIN
SEA
HBR OSH MAN
The gain function reduces the effects of false echoes and clutter. For the best results
Raymarine recommends that you retain the AUTO default setting. You can however
adjust these settings if required. Any adjustments that you make are retained by the
radar when it is switched off.
Sea
Radar echoes from waves around your boat can clutter the centre of the radar picture,
making it difficult to detect real targets (see
Adjusting the sea gain will reduce this clutter for up to 3-5 nautical miles (depending
on wave and sea conditions) from your boat. This has the effect of reducing the seach
echoes to intermittent small dots whilst small targets remain visible.. Gain levels
further from your boat remain unchanged.
To change the sea clutter gain, toggle the SEA soft key to the appropriate mode for your
working area:
• HBR (Automatic harbor mode) - this takes account of the effects of land clut-
ter so that small targets are not lost. It should be used when you are in harbor or in
close proximity to land.
EBL REFERENCE
M/T REL
GAIN TUNE
AUTO MAN AUTO
FTC
MAN ON OFF
page 4
).
5-11
RAIN
ON OFF