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

May 2023

San Francisco Industry Report: May 2023

During May 2023, we saw 200 large vessels transit 16,708 nautical miles in the voluntary vessel speed reduction zone in the San Francisco Bay. The Whale Presence Indicator was “High” or “Very High” for 26 days during that time.


Top 10 Operators

The 10 operators with the most nautical miles transited during May 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 1,065 nm A (87.5%)
Ocean Network Express Pte Ltd 954 nm A (84.3%)
Hyundai Glovis Co Ltd 865 nm D (20.5%)
Chevron Shipping Co LLC 840 nm B (62.2%)
Evergreen Marine Corp 758 nm B (60.8%)
CMA CGM SA The French Line 713 nm A (85.9%)
CSL Americas 701 nm A (86.8%)
Maersk A/S 647 nm A (87.1%)
Princess Cruise Lines Ltd 537 nm D (25.2%)
Matson Navigation Co Inc 527 nm B (79.4%)

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.