Ice Classes
VCDI:Very Close Drift Ice (0.9-1.0), CDI:Close Drift Ice (0.7-0.9), ODI:Open Drift Ice (0.4-0.7), VODI:Very Open Drift Ice (0.1-0.4), OW:Open Water (0.01-0.1), IF:Ice Free (0-0.01)
VCDI:Very Close Drift Ice (0.9-1.0), CDI:Close Drift Ice (0.7-0.9), ODI:Open Drift Ice (0.4-0.7), VODI:Very Open Drift Ice (0.1-0.4), OW:Open Water (0.01-0.1), IF:Ice Free (0-0.01)