ņ5
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.
Type of target
Height from
sea surface
(m)
Detection distance (NM) RCS (m²)
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
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