Chart correction N21/21 — chart 37342

37342 4Ed. 7/20/13 LAST NM N8/21 N21/21 Delete AIS from beacon “Birvideaux” 47°29′09″N 3°17′28″W Building symbol and legend “Bldg (18)” 47°41′31″N 3°18′35″W Substitute Depth 25 meters Wks (unsurveyed) [K30] for 30.5 meters Wks 47°44′30″N 3°46′50″W Change Range of light to 6M 47°47′41″N 3°51′18″W Light to Fl(2) WRG 6s 11m 10-7M 47°47′35″N 3°51′19″W Note: Sectors remain unchanged Add Note in center right margin of chart “MANDATORY PILOTAGE Pilotage is mandatory for any vessel over 6000 tons within the area.” Add Purple composite line [N2.1] with legend “MANDATORY PILOTAGE (SEE NOTE)” joining 47°38′48″N 4°00′05″W 47°38′48″N 3°50′45″W 47°47′26″N 3°47′36″W Depth 45 meters Wk (unsurveyed) [K30] 47°38′44″N 3°44′47″W Pilot station symbol [T1.3] with legend “Greater than 6000 tons” 47°43′06″N 3°48′00″W Buoy “CG1” Y, can, “X” topmark, Fl Y 4s [Q130.6] 47°35′55″N 3°19′35″W Explosives dumping ground area [N23.1] bound by purple composite-line circle, radius 200 meters, centered 47°42′12″N 3°31′00″W (22(57)14, 21(55), 26(54)15, 21(56), 38(60)18, 39(56)20, 1(53), 14(45)21 Brest)

Source: NGA U.S. Notice to Mariners · edition: 4Ed. 7/20/13

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