XSI - Sanya Radio 22:05:35 2012-02-23 MA05 220837 UTC FEB2012 SANYARADIO/XSI NAVIGATIONAL WARNING HN0005 SOUTH CHINA SEA DRILLING WORK BY WEST AQUARIUS RIG IN 17-26.56N/110-57.93E FROM 22 FEB TO 31 MAY.ADVSE TO AVODF M.S.A.2