JRC JMR-7230-S Instruction Manual page 148

Relation between Type and Height of Target and Detection Range and RCS
Type of target
Sea shore line
Sea shore line
Sea shore line
SOLAS target ship
(>5000GT)
SOLAS target ship
(>500GT)
Small boat with IMO
standard compatible radar
reflector
Marine buoy with corner
reflector
Standard marine buoy
10-meter small boat without
radar reflector
Waterway location beacon
Note
Detection range shown in the above table may greatly decrease depending on the shape of the
target, sea state, weather and radio wave propagation conditions.
Section 7 True and False Echoes on Display
Height from Detection range (NM)
sea surface
X band
(m)
60 20
6 8
3 6
10 11
5 8
4 5.0
3.5 4.9
3.5 4.6
2 3.4
1 2.0
7-4
RCS (m²)
S band X band
20 50,000
8 5,000
6 2,500
11 50,000
8 1,800
3.7 7.5
3.6 10
3.0 5
3.0 2.5
1.0 1
S band
50,000
5,000
2,500
30,000
1,000
0.5
1
0.5
1.4
0.1