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

July 2023

San Francisco Industry Report: July 2023

During July 2023, we saw 204 large vessels transit 17,249 nautical miles in the voluntary vessel speed reduction zone in the San Francisco Bay. The Whale Presence Indicator was “High” or “Very High” for 27 days during that time.


Top 10 Operators

The 10 operators with the most nautical miles transited during July 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
Ocean Network Express Pte Ltd 1,501 nm A (84.4%)
Evergreen Marine Corp 919 nm B (68.3%)
Maersk A/S 881 nm A (87.9%)
Chevron Shipping Co LLC 845 nm C (58.7%)
MSC Mediterranean Shipping Co 822 nm A (90.4%)
Yang Ming Marine Transport 822 nm A (81.1%)
CMA CGM SA The French Line 748 nm A (91.7%)
Hyundai Glovis Co Ltd 678 nm C (45.3%)
Matson Navigation Co Inc 662 nm B (61.9%)
Kawasaki Kisen Kaisha Ltd 610 nm B (74.9%)

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.