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