Any sea ice that has drifted from its place of origin.
The term is used in a wide sense to include any areas of sea ice, other than fast ice, no matter what form it takes or how disposed. U.S.N. Hydrographic Office 1952. A Functional Glossary of Ice Terminology. Circular M.
Referring to study of water features (oceans, lakes, rivers), including physical characteristics (oceanography, limnology) and elements affecting safe navigation.
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