WOAA47 NZKL 230621 ICE ACCRETION WARNING 313 THIS AFFECTS OCEAN AREA: SOUTHERN AT 230600UTC OVER WATERS EAST OF WESTERN BOUNDARY AND NORTH OF ICE EDGE. IN AN AREA BOUNDED BY 60S 156E 62S 178W 65S 177W 63S 157E 60S 156E: HEAVY ICE ACCRETION. ICE ACCRETION AREA MOVING EAST 15KT. THIS WARNING CANCELS AND REPLACES WARNING 307.