User Guide Part 6

Chapter 8: Radar 189
small dots, while small targets remain visible and persistent. Gain levels further from
your boat remain unchanged.
Super HD adjustments
You can generally use the default AUTO settings for best results, but two manual
controls allow you to explore Super HD’s capabilities.
Antenna boost
This scales the effective antenna size. At zero, the effective antenna size matches its
actual size. At 95, the effective antenna size is doubled.
Increasing effective antenna size has the effect of separating targets that appear
merged at lower settings.
In some circumstances, a larger effective scanner can be a drawback. In particular, if
you are in a harbor or close to land, you may see more detail than is useful.
For that reason, the AUTO settings for Harbor and Coastal modes provide lower
scale factors of about 30% and 60%.
Power boost
This adjusts effective transmit power. At zero, the radar operates at its standard
power (4kW or 12kW). At 90, the effective power is increased by a factor of at least
two.
Increasing power has the effect of making targets more distinct from noise. For
maximum benefit, reduce gain to prevent saturation of strong targets.
The default power boost setting for all AUTO modes is 90.
8.11Tuning the radar display: ENHANCE ECHOES
The ENHANCE ECHOES softkey gives you access to further features for tuning the
radar display.
Interference rejection
Interference rejection automatically reduces mutual radar interference when two
radarequipped vessels are operating within range of each other. It is switched on by
default.
You can adjust the strength of interference rejection in the Radar Setup Menu.
Turning interference rejection off altogether allows you to detect the presence of
other radars in the vicinity.