San Diego Harbor Police Chula Vista/South Bay Substation on Marina Way provides waterside and tideland law enforcement for the southern rim of San Diego Bay, operating under the Port of San Diego's jurisdiction across five member cities. The substation's patrol zone includes the Chula Vista Marina, Bayfront Park, and the J Street Marina channel — a waterfront corridor that extends north to the 3,400-capacity North Island Credit Union Amphitheatre, where Harbor Police provide event-night perimeter security and traffic control. Approximately 140 sworn Harbor Police officers department-wide patrol San Diego Bay by vehicle, vessel, and foot, providing marine firefighting, vessel collision investigation, and security escorts for incoming cruise ships in coordination with the U.S. Coast Guard. The South Bay Substation coordinates fire-related marine incidents with shore-side engine companies, including Chula Vista Fire Department Station 5 on Orange Avenue, the nearest CVFD unit to the bayfront's tideland boundary. Harbor Police jurisdiction encompasses all Port District tidelands from the Sweetwater Marsh National Wildlife Refuge south to the Otay River floodplain, covering marina berths, anchorages, commercial shipyard facilities, and the 550-acre Chula Vista Bayfront Master Plan redevelopment zone.