Chart correction 52/21 — chart 12256

★12256 19Ed. 10/01/17 LAST NM 39/21 52/21 Relocate Buoy "22" from 37°00′09.5″N 76°17′52.7″W to 37°00′04.1″N 76°18′00.7″W Buoy "21" from 37°00′04.0″N 76°17′02.2″W to 36°59′57.0″N 76°17′37.4″W Change Note to "NOTE C HAMPTON ROADS TUNNEL APPROACH SPANS Bridges Under Construction (see caution)" 36°57′29.0″N 76°16′02.6″W Legend to "Bridges Under Construction (see caution)" 36°57′41.4″N 76°16′14.3″W (See 12/21) Add Caution note "CAUTION Fixed and floating obstructions, some submerged, may exist within the magenta tinted bridge construction area. Mariners are advised to proceed with caution." 36°54′39.0″N 76°13′21.6″W Purple tint (construction area) [Dd] 175 yards wide on centerline between 37°00′42.9″N 76°19′23.1″W 37°00′03.0″N 76°19′05.7″W Purple tint (construction area) [Dd] 175 yards wide on centerline joining 36°58′58.1″N 76°18′06.2″W 36°58′13.2″N 76°18′00.6″W 36°58′02.4″N 76°17′50.9″W Purple tint (construction area) [Dd] 175 yards wide on centerline between 36°57′54.2″N 76°17′13.1″W 36°57′45.7″N 76°16′18.0″W (NOS; 46/21 CG5)

Source: NGA U.S. Notice to Mariners · edition: 19Ed. 10/01/17

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