Mumbai Metro 3 marks first anniversary; Aqua Line clocks 7 crore passenger journeys, connects airport, BKC and key railway hubs. Mumbai Metro Line 3, also known as the Aqua Line, has marked its first anniversary of operations. This line has served over 70 million passengers during its inaugural year of service. Connecting key areas, the Metro reduces travel time significantly compared to surface transport options. It operates consistently from early morning until late evening, catering.