Concentration (C): Total concentration of ice of the entire sea area under consideration
C = Ca + Cb + Cc
Concentration of ice classified according to thickness (for concentration 1/10 and over)
Ca: concentration of Sa-ice,
Cb: concentration of Sb-ice,
Cc: concentration of Sc-iec
Development
Sa: Thickest ice
Sb: Next thickest ice,
Sc: Third thickest ice
So: Development of ice with 1/10 concentration or less but thicker ice than Sa
Sd: If ice of other categories is present, mention the development of that ice.
Size of floe (F):
Fa: size of Sa-ice,
Fb: size of Sb-ice,
Fc: size of Sc-ice
Fp, Fs: Sizes of two most predominat types of ice regardless of S
