WOAA47 NZKL 150631 ICE ACCRETION WARNING 280 THIS AFFECTS OCEAN AREA: SOUTHERN AT 150600UTC OVER WATERS NORTH OF ICE EDGE. IN AN AREA BOUNDED BY 66S 171W 64S 171W 64S 157W 66S 155W 66S 171W: HEAVY ICE ACCRETION. ICE ACCRETION AREA SLOW MOVING.