WOAA47 NZKL 150834 ICE ACCRETION WARNING 247 THIS AFFECTS OCEAN AREA: SOUTHERN AT 150600UTC OVER WATERS EAST OF WESTERN BOUNDARY AND NORTH OF ICE EDGE. IN AN AREA BOUNDED BY 66S 178E 66S 174W 73S 163W 68S 159E 66S 178E: HEAVY ICE ACCRETION. ICE ACCRETION AREA MOVING EASTSOUTHEAST 15KT. THIS WARNING CANCELS AND REPLACES WARNING 237.