Chart correction N40/20 — chart 71247

71247 21Ed. 4/13/19 LAST NM N39/20 N40/20 Delete Buoy “AZ4” 1°15′13.5″N 103°48′35.0″E Add Buoy Y, pillar, “X” topmark, Fl Y 2s [Q130.6] 1°15′13.2″N 103°48′33.6″E (8(48)20 Singapore)

Source: NGA U.S. Notice to Mariners · edition: 21Ed. 4/13/19

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