6－4
JMA-9100 Instruction Manual > 6.TRUE AND FALSE ECHOES ON DISPLAY > 6.2 STRENGTH OF REFLECTION FROM THE
TARGET
Table 6-1： Relation between type and height of target and detection distance and RCS
Type of target
Height from
sea surface
(m)
Detection distance
(NM)
RCS
X band S band X band S band
Sea shore line 60 20 20 50,000 50,000
Sea shore line 6 8 8 5000 5000
Sea shore line 3 6 6 2500 2500
SOLAS target ship (>5000GT) 10 11 11 50,000 30,000
SOLAS target ship (>500GT) 5 8 8 1800 1000
Small boat with IMO standard
compatible radar reflector
45.03.77,50,5
Marine buoy with corner
reflector
3,5 4.9 3.6 10 1
Standard marine buoy 3,5 4.6 3.0 5 0,5
10-meter small boat without
radar reflector
23.43.02,51,4
Waterway location beacon 1 2.0 1.0 1 0,1
Detection distance shown in the above table may greatly
decrease depending on the shape of the target, sea state,
weather and radio wave propagation conditions.
m
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