Installation Instructions

13
(a) A place where you can see the ship's bow when you raise your face from the
radar screen.
(b) A place where there is no direct sun-light to avoid display temperature up.
(c) A place where there is good ventilation and minimum vibration.
(d) A place where the display unit is apart more than the minimum safe dis-
tance from a magnet compass as listed in Tab.3-5 below.
Tab.3-5 Minimum Safe Distance from Magnetic Compass
3.3.3 Shifting away from obstacles
!
!!
! Shifting from keel line
By shifting the scanner position from the keel line to the starboard side of
the ship, it is possible to move shadow zones to the port side which makes it
possible to keep clear vision in the bow direction. The distance to be shifted can
be obtained by calculation depending on the distance from the scanner to obsta-
cles using the following equation:
Ls=0.4R+D/2 [m] (when R<15m)
Ls=0.025R+D/2 [m] (when R>=15m)
where Ls = distance to be shifted from keel line
D = diameter of obstacle on keel line
R = distance from scanner to obstacle
"
""
"
Obtaining sufficient dip angle
Raise the scanner position so that there is a sufficient dip angle
θ
available
between the line of sight from the scanner to the obstacle and the horizontal
line. By raising the dip angle above 5
°
, it is possible to prevent mid- and long-
distance shadow zones. The radar cannot detect objects below the line of sight.
Master compass Steering compass
Scanner unit
2.0m 1.4m
Display unit
2.0m 1.4m
Ls
R
D
Scanner Unit
Obstacle
Keel line
Fig.3-1 Shifting from keel line