Chart correction N21/20 — chart 74237

74237 4Ed. 9/22/17 LAST NM N41/19 N21/20 Delete Dangerous wreck 19°14.674′S 146°49.607′E Depth 1.5 meters 19°15.623′S 146°50.577′E Relocate Buoy “No 7” from 19°15.731′S 146°50.490′E to 19°15.729′S 146°50.476′E Buoy “No 3” from 19°15.496′S 146°50.698′E to 19°15.482′S 146°50.710′E Buoy “No 5” from 19°15.607′S 146°50.599′E to 19°15.624′S 146°50.582′E Substitute Buoy “No 12” R, can, Fl R 2.5s for beacon “No 12” 19°16.160′S 146°50.100′E Change Characteristic of buoy to Fl Y 2.5s 19°14.580′S 146°50.373′E (21(854), 25(1074)17, 7(318)19 Wollongong)

Source: NGA U.S. Notice to Mariners · edition: 4Ed. 9/22/17

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