Q.AIS, RADAR, ARPA & VHF- which one should not be used for anti collision?

Answer 3 Answers

ARPA is part of RADAR can be used for anti collision.Radar is more reliable equipment for anti collision provided Gps,gyro.,log and AIS data is interfaced with radar .Radar bearing and range should adjusted correctly to get accurate CPA/TCPA.

AIS can be used as referance 

AIS should not be used as an anti collision device.