An ice floe () is a segment of floating ice defined as a flat piece at least across at its widest point, and up to more than across. Drift ice is a floating field of sea ice composed of several ice floes. They may cause on freshwater rivers, and in the open ocean may damage the hulls of ships.
Gallery
File:Drift ice in Hudson Strait, 2014.jpg|Several ice floes in the Hudson Strait
File:IceNomenclature-2LightPack.jpg|Ice floes in the Weddell Sea
File:In the Arctic Sea - An Ice Floe Adrift (NBY 439626).jpg| "In the Arctic Sea – An Ice Floe Adrift". Postcard, Albert Operti, early 20th century