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NOAA Nautical Chart 18640
San Francisco to Point Arena
Chart 18640OG
NOAA Custom Chart (updated)
At the discretion of USCG inspectors, this chart may meet carriage requirements.
Scale: 207840
Actual Chart Size: 40.2" x 35.2"
Paper Size: 36.0" x 42.0"
For weekly NOAA chart update, please click here
Click here to access the Zone of Confidence (ZOC) diagram along with important notes. You can either view the information or print it. This chart may or may not contain insets.
The chart you are viewing is a NOAA chart by OceanGrafix. Printed “on-demand,” it contains all of the latest NOAA updates as of the time of printing. This chart is available for purchase online.
Chart 18640
Traditional NOAA Version (not updated)
Scale: 207,840
Actual Chart Size: 40.6" x 34.7"
Paper Size: 36.0" x 44.0"
Edition #: 27
Edition Date: 2015-10-01
NTM Notice/Date: 4824 2024-11-30
NTM: https://msi.nga.mil
LNM Notice/Date: 4824 2024-11-26
This chart has been canceled so it is NOT updated weekly and does NOT include all of the latest Notice to Mariners corrections. This chart is available for purchase online.
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