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WMO Ice Concentration symbols used on ice charts
| Ice chart pattern |
Total Ice concentration |
| |
Blackened area representing fast ice. |
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Fast ice. |
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9 to 10 tenth. |
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7 to 8 tenth. |
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4 to 6 tenth. |
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1 to 3 tenth. |
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Less than 1 tenth. |
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WMO Ice Concentration symbols used on ice charts
| Ice chart symbol |
Ice concentration and type |
| |
Ice free. |
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Icebergs but no, or under 1/10, sea ice. |
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New sea ice. |
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Strips and paches of ice. |
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Few icebergs. |
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Many icebergs |
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Few Growlers |
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Many Growlers |
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