Chart correction N20/23 — chart 18442
18442 1Ed. 07/01/05 LAST NM N17/23 N20/23 Substitute Dangerous wreck [K28] for depth 8.5 meters 48°47′26″N 123°31′16″W Add Depth 3.4 meters 48°52′45″N 123°34′33″W and extend blue tint and depth contour (5- meter) W to enclose Depth 1.7 meters Wk [K26] 48°51′58″N 123°33′06″W (2/23 Ottawa)
Source: NGA U.S. Notice to Mariners · edition: 1Ed. 07/01/05
Reference information — always verify against official Notices to Mariners before navigation.