WOAA47 NZKL 210637 ICE ACCRETION WARNING 413 THIS AFFECTS OCEAN AREA: SOUTHERN AT 210600UTC OVER WATERS NORTH OF ICE EDGE. IN AN AREA BOUNDED BY 67S 170W 62S 171W 62S 147W 67S 140W 67S 170W: HEAVY ICE ACCRETION. ICE ACCRETION AREA MOVING EAST 20KT. THIS WARNING CANCELS AND REPLACES WARNING 408.=