| Code/Flag Figure |
Description |
Status |
|
0
|
No sea ice in sight
|
Operational
|
|
1
|
Ship in open lead more than 1.0 nautical mile wide, or ship in fast ice with boundary beyond limit of visibility
|
Operational
|
|
2
|
Sea ice present in concentrations less than 3/10 (3/8), open water or very open pack ice
(Sea ice concentration is uniform in the observation area)
(Ship in ice or within 0.5 nautical mile of ice edge)
|
Operational
|
|
3
|
4/10 to 6/10 (3/8 to less than 6/8), open pack ice
(Sea ice concentration is uniform in the observation area)
(Ship in ice or within 0.5 nautical mile of ice edge)
|
Operational
|
|
4
|
7/10 to 8/10 (6/8 to less than 7/8), close pack ice
(Sea ice concentration is uniform in the observation area)
(Ship in ice or within 0.5 nautical mile of ice edge)
|
Operational
|
|
5
|
9/10 or more, but not 10/10 (7/8 to less than 8/8), very close pack ice
(Sea ice concentration is uniform in the observation area)
(Ship in ice or within 0.5 nautical mile of ice edge)
|
Operational
|
|
6
|
Strips and patches of pack ice with open water between
(Sea ice concentration is not uniform in the observation area)
(Ship in ice or within 0.5 nautical mile of ice edge)
|
Operational
|
|
7
|
Strips and patches of close or very close pack ice with areas of lesser concentration between
(Sea ice concentration is not uniform in the observation area)
(Ship in ice or within 0.5 nautical mile of ice edge)
|
Operational
|
|
8
|
Fast ice with open water, very open or open pack ice to seaward of the ice boundary
(Sea ice concentration is not uniform in the observation area)
(Ship in ice or within 0.5 nautical mile of ice edge)
|
Operational
|
|
9
|
Fast ice with close or very close pack ice to seaward of the boundary
(Sea ice concentration is not uniform in the observation area)
(Ship in ice or within 0.5 nautical mile of ice edge)
|
Operational
|
|
10-13
|
Reserved
|
Operational
|
|
14
|
Unable to report, because of darkness, lack of visibility, or because ship is more than 0.5 nautical mile away from ice edge
|
Operational
|
|
15-30
|
Reserved
|
Operational
|
|
31
|
Missing value
|
Operational
|