WOAA47 NZKL 182018 ICE ACCRETION WARNING 414 THIS AFFECTS OCEAN AREA: SOUTHERN AT 181800UTC OVER WATERS EAST OF WESTERN BOUNDARY AND NORTH OF ICE EDGE. IN AN AREA BOUNDED BY 71S 172E 67S 160E 63S 160E 64S 170E 71S 172E: HEAVY ICE ACCRETION. ICE ACCRETION AREA MOVING SOUTH 10KT. THIS WARNING CANCELS AND REPLACES WARNING 406.=