I called Luzon Strait, this cargo ship on VHF and the officer changed his course to give way to me. All good. The distance between us was 1 nm. My AIS alarm (“dangerous vessel”) went off when he was 9 nm in front of me. Another great tool for me is the AIS-page on the PredictWind App showing me the AIS-positions of most ships. Some class B AIS signals don’t show on this chart when they are too weak to be picked up by satellites. My class A AIS transponder has a higher output power and produces a very reliable signal.
