Name	Notation	Description	Types	Status
No sea ice in sight	0		Concept	stable
Ship in open lead more than 1.0 nautical mile wide, or ship in fast ice with boundary beyond limit of visibility	1		Concept	stable
Sea ice present in concentrations less than 3/10 (3/8) open water or very open pack ice	2		Concept	stable
4/10 to 6/10 (3/8 to less than 6/8), open pack ice	3		Concept	stable
7/10 to 8/10 (6/8 to less than 7/8), close pack ice	4		Concept	stable
9/10 or more, but not 10/10 (7/8 to less than 8/8), very close pack ice	5		Concept	stable
Strips and patches of pack ice with open water between	6		Concept	stable
Strips and patches of close or very close pack ice with areas of lesser concentration between	7		Concept	stable
Fast ice with open water, very open or open pack ice to seaward of the ice boundary	8		Concept	stable
Fast ice with close or very close pack ice to seaward of the boundary	9		Concept	stable
Unable to report, because of darkness, lack of visibility, or because ship is more than 0.5 nautical mile away from ice edge	14		Concept	stable
Missing value	31		Concept	stable