California voluntary speed reduction reports its 2025 season
Reporting on the 2025 Blue Whales and Blue Skies season states that 787 vessels across 44 shipping lines slowed over more than 481,000 nautical miles in designated coastal zones, that participating vessels cut fatal strike risk to blue, fin and humpback whales by 40 percent against a 2016 baseline, and that underwater radiated noise intensity fell by 70 percent. The programme is being extended statewide under California Assembly Bill 14.
Observed — measured or witnessed, with the observation cited.
Subjects
- Blue Whales and Blue Skies Vessel Speed Reduction Programme · policy · United States · not located
- Vessel Collision with Large Whales · phenomenon · Busy shipping lanes overlapping whale habitat · not located
- Santa Barbara Channel · maritime region · United States · not located
Evidence
Partly verified — Core facts are sourced; some optional detail is deliberately absent.
Blue Whales and Blue Skies: 2025 vessel speed reduction season reporting
In the 2025 season 787 vessels across 44 shipping lines voluntarily reduced speed over more than 481,000 nautical miles in designated zones along the California coast; participating vessels reduced fatal strike risk to blue, fin and humpback whales by 40 percent against a 2016 baseline and cut underwater radiated noise acoustic intensity by 70 percent. The programme asks vessels of 300 gross tons or more to slow to 10 knots or less and is being extended statewide under California Assembly Bill 14. V55 verification basis: retrieved in search summary of agency announcements; the underlying analyses were not obtained, and the risk reduction is reported for participating vessels rather than for all traffic.
Santa Barbara County Air Pollution Control District, with the California Ocean Protection Council · reported 2026 · Partly verified
https://www.ourair.org/air-pollution-marine-shipping/ ; https://opc.ca.gov/2026/05/protecting-whales-from-ship-strikes/
Recorded on Blue Whales and Blue Skies Vessel Speed Reduction Programme
- Eastern North Pacific blue whales are estimated near carrying capacity
- California voluntary speed reduction reports its 2025 season
Related
Related because they share a subject in the Atlas — never because the text looks similar.