65
Table 6.1 Relation between type and height of target and detection distance and RCS
Caution: 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.
Detection distance (NM)
RCS (m²)
Type of target
Height from
sea surface
(m)
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
4 5.0
3.7
7.5
0.5
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
2 3.4
3.0
2.5
1.4
Waterway location beacon
1
2.0
1.0
1
0.1
Summary of Contents for JMA-5212-4
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