<p>In March, the Port of San Diego began a voluntary vessel speed reduction program as part of its Clean Air Program to reduce air pollution around San Diego Bay and the tidelands. The period from April to June marks the first complete quarter since the program was implemented. During this time, 27 cruise and cargo vessels called on the port and 69 percent traveled within the voluntary speed limits during both inbound and outbound trips. The voluntary limits are 12 knots for cargo ships and 15 knots for cruise ships. Vessel operators are asked to observe these speed limits when traveling in an area that extends 20 nautical miles seaward from Point Loma. The difference in the speed limits is based on differing engine fuel efficiencies. Of all the cruise ships that visited the port during this quarter, 86 percent were compliant with the speed limit. Cargo vessels were 53 percent compliant. During the first reporting period, three cruise operators achieved 90 percent compliance -- Carnival Cruise Lines, Princess Cruises, and Wilhelmsen Ship Management Ltd., USA. During this first quarter, the voluntary vessel speed reduction program has resulted in an estimated 10 percent reduction in emissions from participating vessels. For more information, visit www.portofsandiego.org.</p>