Chart correction N7/21 — chart 94217
94217 7Ed. 8/4/12 LAST NM N51/20 N7/21 Delete Dangerous wreck (PA) 31°23′35.1″N 121°39′00.0″E (See N31/20) Add Depth 11.5 meters Wk [K26] 31°22′37.3″N 121°40′39.8″E Depth 4.7 meters, blue tint and enclosing approximate depth contour [I31] (5-meter) centered 31°23′33.6″N 121°36′57.6″E Depth 1.6 meters, blue tint and enclosing approximate depth contour [I31] (2-meter) centered 31°23′42.6″N 121°36′42.0″E (32(1185), 33(1216)20 Tianjin; 36(4208)20 Taunton)
Source: NGA U.S. Notice to Mariners · edition: 7Ed. 8/4/12
Reference information — always verify against official Notices to Mariners before navigation.