Chart correction N18/23 — chart 53135
53135 3Ed. 08/26/17 LAST NM N14/21 N18/23 Substitute Foul ground symbol [K31.1] for wreck 42°26′40.5″N 11°07′00.5″E Add Depth 3.3 meters 42°21′55.4″N 10°55′14.7″E and extend depth contour (10-meter) NE to enclose (Plan) Substitute Foul ground symbol [K31.1] for wreck 42°26′40.5″N 11°07′00.5″E (5(6), 7(2)23 Genova) NM 18/23 SECTION I I - 1.8
Source: NGA U.S. Notice to Mariners · edition: 3Ed. 08/26/17
Reference information — always verify against official Notices to Mariners before navigation.