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Electronic Chart Systems Ice Objects Catalogue, Version 5.1. Draft for Approval. February 2012. [SUPERSEDED by http://hdl.handle.net/11329/403]
(WMO/JCOMM Expert Team on Sea Ice, Geneva, Switzerland, 2012)
Many Arctic and Baltic nations maintain Ice Services and issue ice charts on a regular basis when
marine activities are occurring in the vicinity of
sea ice and icebergs. These ice charts are used on ships as an aid ...