Targets to Detect Radar Cross
Section
(m2)
Target
Height (m)
Minimum Range of Detection (nm)
Antenna 3m High Antenna 15m High
Simrad
HALO-3
Simrad
HALO-4
Simrad
HALO-6
IEC 62388 Simrad
HALO-4
Simrad
HALO-6

Shorelines to 60m

50,000 50 13.0 15.3 18.4 20.0 21.3 25.6

Shorelines to 6m

5,000 5 4.8 5.6 6.7 8.0 10.1 12.1

Shorelines to 3m

2,500 2.5 3.6 4.2 5.0 6.0 7.6 9.1

SOLAS ships >5000gt

50,000 10 7.1 8.3 10.0 11.0 13.5 16.2

SOLAS ships >500gt

1,800 5 4.3 5.1 6.1 8.0 9.6 11.5

Small vessel with radar reflector meeting IMO Performance Standards

7.5 4 2.4 2.8 3.4 5.0 5.4 6.5

Navigation buoy with corner reflector

10 3.5 2.3 2.7 3.2 4.9 5.3 6.4

Typical navigation buoy

5 3.5 2.0 2.3 2.8 4.6 5.0 6.0

Small vessel <10m length with no radar reflector

2.5 2.5 1.6 1.9 2.3 3.4 4.2 5.0

Typical channel marker

1 1 0.9 1.0 1.2 2.0 2.4 2.9

Large flocks of diving birds

Highly
Variable
1-15 2-3 3-4 4-5 N/A N/A N/A
Note:Simrad Halo is not an IMO-approved radar solution for SOLAS vessels