Because of the large contrast between open water and ice, visible images can at times be saturated for the generally white sea ice. Nevertheless, there is valuable information in those “different shades of white.” For example, as snow and ice age they get slightly darker. Also variations in surface topography can be identified. Therefore, data with the full dynamic range in contrast would be preferable. Any Multi-spectral data, if available, would be particularly valuable to obtain more complete information on albedo and radiative surface fluxes.