WOAA47 NZKL 150833 ICE ACCRETION WARNING 246 THIS AFFECTS OCEAN AREA: SOUTHERN AT 150600UTC OVER WATERS NORTH OF ICE EDGE. IN AN AREA BOUNDED BY 70S 141W 68S 141W 67S 122W 69S 122W 70S 141W: HEAVY ICE ACCRETION DEVELOPING NEXT 6 HOURS. ICE ACCRETION AREA THEN SLOW MOVING.