WOAA47 NZKL 221320 ICE ACCRETION WARNING 446 THIS AFFECTS OCEAN AREA: SOUTHERN AT 221200UTC OVER WATERS NORTH OF ICE EDGE. IN AN AREA BOUNDED BY 66S 179E 63S 179W 61S 143W 68S 135W 66S 179E: HEAVY ICE ACCRETION. ICE ACCRETION AREA MOVING EAST 20KT. THIS WARNING CANCELS AND REPLACES WARNING 437.=