Reference Manual Part 2

G-Series Reference Manual 142
In some circumstances, a larger effective scanner can be a draw-
back. 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.