Chart correction 51/21 — chart 12221
★12221 84Ed. 05/01/19 LAST NM 46/21 51/21 Delete Depth 12 feet 37°13′43″N 75°47′29″W Add Depth 1 foot enclosed by depth contour (6-foot) centered 37°13′50″N 75°47′24″W Depth 1 foot 37°14′08″N 75°47′34″W and extend depth contour (6-foot) SE to enclose (NOS)
Source: NGA U.S. Notice to Mariners · edition: 84Ed. 05/01/19
Reference information — always verify against official Notices to Mariners before navigation.