Chart correction N21/20 — chart 17496
17496 1Ed. 10/29/99 LAST NM N17/20 N21/20 Add Submarine cable [L30.1] joining 49°27′27″N 124°43′59″W 49°28′19″N 124°45′39″W 49°28′55″N 124°46′09″W 49°29′14″N 124°46′08″W (3/20 Ottawa) ★18528 11Ed. 7/08 LAST NM 26/13 21/20 (Left Section) Add Chartlet A from Subsection I-2 45°29′22.0″N 122°39′47.0″W Chartlet B from Subsection I-2 45°28′22.0″N 122°39′34.0″W (NOS) ★18765 17Ed. 11/10 LAST NM 3/20 21/20 (Inset Mission Bay) Add Dangerous wreck [K28] (PA) 32°45′31.0″N 117°15′25.0″W (NOS)
Source: NGA U.S. Notice to Mariners · edition: 1Ed. 10/29/99
Reference information — always verify against official Notices to Mariners before navigation.