An ice floe (/floʊ/) is a large pack of floating ice often defined as a flat piece at least 20 m across at its widest point, and up to more than 10 km across.^[1] Drift ice is a floating field of sea ice composed of several ice floes. They may cause ice jams on freshwater rivers, and in the open ocean may damage the hulls of ships.

Gallery

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  Several ice floes in the Hudson Strait
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  Ice floes in the Weddell Sea
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  "In the Arctic Sea – An Ice Floe Adrift". Postcard, Albert Operti, early 20th century