JS1/22 CHANGJIANG IN VICINITY BETWEEN NO.1 LIGHT BUOY AND SU-TONG YANGTZE RIVER HIGHWAY BRIDGE NANTONG VTS CENTRE STOP VESSEL TRAFFIC SERVICES WITH VHF CHANNEL 10 AND RADAR UNUSABLE FROM 160400UTC TO 291600UTC MAY.PASS WITH CAUTION ADVISED.KEEP WATCH ON VHF CHANNEL 69.JIANGSU MSA CHINA.