6 - Indicator figure,ice accretion group
Is - Type of ice accretion
Code Description
1 Icing from sea spray.
2 Icing from fog.
3 Icing from spray and fog.
4 Icing from rain.
5 Icing from spray and rain.
EsEs - Ice thickness in centimetres
Rs - Rate of ice accretion
Code Description
0 Ice not building up.
1 Ice building up slowly.
2 Ice building up rapidly.
3 Ice melting or breaking up slowly.
4 Ice melting or breaking up rapidly.