Navman 8120 - Manual (Page 9)

NAVMAN 8120/8084 Fuel, AIS, & Radar Addendum 9
Radar
Radar is the Radio Detection And Ranging
system. Radar functions require an optional
NAVMAN radar system to be installed. Three
radar systems are available; 2 kW, 4 kW, or
6 kW.
When the radar is operating, the scanner
transmits powerful microwave radio pulses
which are reflected back from any solid
objects such as land masses or other boats.
These objects are called targets and are
shown on the radar window. The scanner rotates through 360° so the
radar window shows all of the area around
your boat within the range of the scanner,
producing a map-like display called the PPI
(Plan Position Indicator).
Typically, your boat is in the centre of the
radar window with concentric range rings
surrounding it. The range rings help you
to quickly estimate the distance to various
targets.
You can also view the radar overlaid on the
chart screen.
Radar window
The radar window shows:
A Distance between each range ring (in this
example, 1/8 nautical mile)
B Range of radar (in this example, shown in
large digits)
C Radar rotation (in this example, North Up)
D Radar motion mode (in this example,
Relative Mode)
E Cursor
F Distance and bearing to the cursor from
the vessel position
G Compass ring
H Range ring
I North line (blue)
J Heading line (white)
K The bearing (in Relative, True, or Magnetic
mode)
L Echo Expansion setting
M Interference Rejection setting
I
J
H
M
L
K
D
C
B
A
G
E
F