Chart correction N17/21 — chart 25527
25527 32Ed. 5/30/15 LAST NM N16/21 N17/21 Substitute Buoy “No 4” G, pillar, can topmark, Fl(2) G 6s for beacon 14°35′31.3″N 61°03′49.8″W Change Shape of buoy “BC” to conical 14°33′59.5″N 61°02′40.7″W Characteristic of buoy “No 1” to QR 14°34′29.3″N 61°04′58.7″W Add Submarine cable [L30.1] joining 14°33′08.2″N 61°05′19.3″W 14°33′05.9″N 61°05′24.5″W 14°33′01.5″N 61°05′42.5″W 14°33′00.5″N 61°05′59.8″W 14°32′59.8″N 61°06′05.6″W Submarine cable [L30.1] joining 14°33′11.4″N 61°05′21.6″W 14°33′09.6″N 61°05′27.0″W 14°33′09.6″N 61°06′05.7″W Submarine cable [L30.1] joining 14°36′43.9″N 61°05′56.4″W 14°36′38.7″N 61°06′05.6″W 14°36′32.2″N 61°06′11.0″W 14°36′15.1″N 61°06′34.9″W (28(255)16, 2(258)18, 8(260)19 Brest; 45(5233)18, 3(385)19 Taunton)
Source: NGA U.S. Notice to Mariners · edition: 32Ed. 5/30/15
Reference information — always verify against official Notices to Mariners before navigation.