ship-generated spray. Other possibilities are snow fall, sea fog, a drastic fall in ambient temperature and also freezing raindrops in contact with the cold steel. The heading of the vessel relative to the wind and seas will determine which parts of the superstructure will ice first. Icing can immobilise equipment such as anchors or cause a dangerous list if the windward side of the vessel ices more heavily.

Ice detection by radar

A radar can be useful in detecting ice, but the returning signal

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