Chart correction N30/21 — chart 37121

37121 12Ed. 8/6/11 LAST NM N11/20 N30/21 Add “Compulsory Pilotage Outer Limit” area [N2.1] bound by purple composite line joining 51°03′13″N 1°57′32″E 51°03′00″N 1°55′33″E 51°02′29″N 1°51′13″E 51°02′24″N 1°51′13″E Note: Area extends beyond chart border “Compulsory Pilotage Outer Limit” area [N2.1] bound by purple composite-line greater arc of a circle, radius 3.5 miles, centered 50°58′56″N 1°51′35″E arc between 50°57′13″N 1°46′42″E 50°59′17″N 1°57′04″E (48(33)20 Brest; UKHO ARCS 1892-0)

Source: NGA U.S. Notice to Mariners · edition: 12Ed. 8/6/11

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