Chart correction N9/21 — chart 93721

93721 7Ed. 3/30/19 LAST NM N7/21 N9/21 Relocate Buoy “F18” from 22°36′53″N 113°45′09″E to 22°37′00″N 113°45′21″E Buoy “F17” from 22°36′57″N 113°45′17″E to 22°37′04″N 113°45′30″E Buoy “F16” from 22°36′16″N 113°45′30″E to 22°36′24″N 113°45′43″E Buoy “F15” from 22°36′22″N 113°45′39″E to 22°36′29″N 113°45′51″E Buoy “F14” from 22°35′44″N 113°45′50″E to 22°35′38″N 113°46′11″E Buoy “F13” from 22°35′50″N 113°45′58″E to 22°35′41″N 113°46′21″E Buoy “F12” from 22°35′14″N 113°46′09″E to 22°35′01″N 113°46′34″E Buoy “F11” from 22°35′20″N 113°46′17″E to 22°35′06″N 113°46′42″E Buoy “F10” from 22°34′54″N 113°46′21″E to 22°34′35″N 113°46′46″E Buoy “F9” from 22°34′59″N 113°46′29″E to 22°34′39″N 113°46′59″E Buoy “F6” from 22°33′45″N 113°47′00″E to 22°33′47″N 113°46′53″E Buoy “F3” from 22°33′22″N 113°47′28″E to 22°33′19″N 113°47′22″E Buoy “F2” from 22°32′45″N 113°47′41″E to 22°32′43″N 113°47′33″E (See N19/20) Add Racon (O) [S3.3] to buoy 22°19′01″N 113°48′05″E (50(1817), 51(1860)20 Tianjin)

Source: NGA U.S. Notice to Mariners · edition: 7Ed. 3/30/19

Reference information — always verify against official Notices to Mariners before navigation.