What is another word for coal ice?
Pronunciation: [kˈə͡ʊl ˈa͡ɪs] (IPA) 
Coal ice refers to ice that is made up of small, spherical pellets that resemble lumps of coal. While this term is widely used in marine navigation, there are several synonyms for coal ice, including hard rime ice, black ice, dark ice, and frozen sleet. Hard rime ice refers to ice that is formed when supercooled droplets freeze instantaneously upon contact with an object. On the other hand, black ice, dark ice, and frozen sleet are all general terms used to refer to ice that is difficult to see and can be hazardous to drivers and pedestrians alike. Regardless of the term used, it is important to exercise caution when navigating or walking on icy surfaces.
