Raytheon Pathfinder 1200 Instruction Manual page 29

2.5.5 Shadows
Although the scanner unit should be ideally placed where there is a good all-around
view, as far away as possible from any part of the ship's superstructure or rigging to refrect
the beam, there may be some obstructions. An obstruction will throw either a complete
or partial shadow as shown in Figure 2-10.
If there are targets in such shadow sector, target's echoes may not be displayed on the
screen. Thus, it is important to know the bearings and width of all shadow sectors, and it
can be checked by turning the SEA CLUTTER control to zero when light rain clutter covers
much of the screen and the sea is calm.
Any
shadow
will then be shown dark sectors in the clutter.
o
SCANNER
2701------+-=~
..... - + - - - - , l - - 1
PARTIAL
SHADOW
BLIND SECTOR
FIG. 2-10 SHADOWS
PARTIAL
SHADOW
2-13