Chart correction 18/23 — chart 18000

★18000   8Ed.  08/21/93  LAST  NM  44/22  18/23 Add Purple tint area (traffic separation zone) [M13] bound by limit joining   34°25.7′N  120°51.8′W   34°29.2′N  121°06.9′W   34°27.2′N  121°07.6′W   34°23.7′N  120°52.5′W Purple heavy dashed line (outside limit of traffic lane) [M15] between   34°26.6′N  120°51.5′W   34°30.1′N  121°06.6′W Purple heavy dashed line (outside limit of traffic lane) [M15] between   34°22.8′N  120°52.8′W   34°26.3′N  121°08.0′W Note: The above change to the Traffic Separation Scheme has been adopted by IMO and will become effective at 0001 GMT on 1 June 2023 (NTM0007/2023)

Source: NGA U.S. Notice to Mariners · edition: 8Ed. 08/21/93

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