Radio Direction Finding (RDF)
RDF is another important sensor that supports the clarification of the surveillance picture. RDF is a technique where by the bearing of a transmission can be accurately calculated and the bearing can be displayed on a VTS console.
By correlating the bearing of a radio broadcast emanating from a ship with a radar contact it is often possible to identify an otherwise unknown target.
In terms of responding to an emergency situation regardless of the state of the surveillance picture, the reception of a bearing line from an emergency broadcast can enable the immediate direction of resources to the emergency before the absolute location of the vessel experiencing the emergency is known.
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