Voluntary Vessel Speed Reduction Zone In Effect NOAA recommends that vessels > 300 gross registered tons transiting the zone do so at speeds of 10 knots or less

November 2023

San Francisco Industry Report: November 2023

During November 2023, we saw 197 large vessels transit 17,043 nautical miles in the voluntary vessel speed reduction zone in the San Francisco Bay. The Whale Presence Indicator was “High” or “Very High” for 10 days during that time. Note, the acoustic system is currently offline and not reflected in the Whale Presence Indicator.


Top 10 Operators

The 10 operators with the most nautical miles transited during November 2023. Grade indicates the percentage of total transit distance that was at or below the 10 knot voluntary speed recommendation put in place to protect endangered whales.

Operator Distance (nm) Grade
MSC Mediterranean Shipping Co 1,090 nm A (93.3%)
NYK Line 1,040 nm A (83.7%)
Evergreen Marine Corp 869 nm B (73.4%)
Ocean Network Express Pte Ltd 805 nm A (86.4%)
Yang Ming Marine Transport 763 nm A (85.6%)
CMA CGM SA The French Line 747 nm A (93.8%)
Matson Navigation Co Inc 663 nm B (61.1%)
Maersk A/S 626 nm A (86.50%)
CSL Americas 548 nm A (89.6%)
MOL Chemical Tankers Pte Ltd 495 nm B (68.1%)

Voluntary Vessel Speed Reduction Zone

The Voluntary Speed Restriction is currently:


For more information, see NOAA’s Vessel Speed Reduction Guidelines.

What is Whale Safe?

For more information, visit the Whale Safe website.