he Vessel Speed Reduction (VSR) program is a voluntary emission reduction strategy led by the District and available to ocean carriers to reduce sir pollution and greenhouse gas (GHG) emissions In the San Diego Air Basin from ocean-going vessels. An update lo the District's program is an Identified objective In the District's recently adopted Maritime Clean Air Strategy (MCAS).
The District's existing VSR program targets 80% participation and identifies a 12 nautical mile per hour speed limit for cargo ships, and a 15 nautical mile per hour speed limit for cruise ships, through a zone extending 20 nautical miles seaward from the end of Point Lama. The update to the VSR program seeks ta expand the zone from 20 nautical miles to 40 nautical miles, Increase the annual participation goal from 80 percent to 90 percent, and employ a weighted average speed method of calculation to determine levels of participation in the program.
Preliminary estimates suggest that if 90 percent participation Is reached within the 40 nautical mile VSR zone, the update to the VSR Program would reduce annual emission for diesel particulate matter (DPM) by 4.3 tons, nitrogen oxides (NOx) by 225.5 tons, and GHG by 9,791 tons.
The District's Board of Port Commissioners voted to adopt a resolution to update the VSR program on November 9, 2021.