WOAA47 NZKL 210021 ICE ACCRETION WARNING 210 THIS AFFECTS OCEAN AREA: SOUTHERN AT 210000UTC IN AN AREA BOUNDED BY 73S 144W 79S 149W 79S 174E 73S 171W 73S 144W: HEAVY ICE ACCRETION. ICE ACCRETION AREA SLOW MOVING. THIS WARNING CANCELS AND REPLACES WARNING 207.=