Chart correction N40/21 — chart 94218
94218 6Ed. 8/11/12 LAST NM N32/21 N40/21 Delete Dangerous wreck (PA) 31°23′18.0″N 121°33′53.4″E Depth 3.7 meters 31°24′38.8″N 121°34′32.1″E (See N51/20) Add Depth 18.5 meters 31°23′43.1″N 121°33′39.6″E “Prohibited Area” [N2.2] bound by shore and purple dashed line joining 31°26′22.0″N 121°34′32.2″E 31°26′08.3″N 121°34′18.7″E 31°26′28.5″N 121°33′55.2″E Note: Area extends beyond chart border (See N36/18) (16(543), 29(1013)21 Tianjin)
Source: NGA U.S. Notice to Mariners · edition: 6Ed. 8/11/12
Reference information — always verify against official Notices to Mariners before navigation.