Its termini are Chhatrapati Shivaji Maharaj Terminus (CSMT), Goregaon and Panvel on the CSMT-Goregaon, CSMT-Panvel and Panvel-Goregaon routes.

The line was extended to Vashi, with the inaugural suburban service being flagged off by President Ramaswamy Venkataraman on 9 May 1992.

This proved to be a boon for commuters of the two stations, who, until then, had to take a circuitous route via Mumbai city and had to change trains at Kurla.

The last direct current (DC) suburban local train ran on the Harbour line on 10 April 2016.

However, due to the critical Ravli Junction Yard signal box, there are various public references to this name in news articles and other sources.

[12][13] (A Walkway has been constructed which connects to Lokmanya Tilak Terminus) CR has sought permission from the Railway Board to run EMUs on the Harbour line between Kurla and Shivajinagar in Pune.

CR plans to use 16 coach mail/express trains to cover the 170 km distance in approximately 2 hours and 50 minutes.

Stations on the line will be Kurla, Vashi, Belapur, Panvel, Karjat, Lonavla and Shivajinagar.

[15] Work on extending Harbour Line branch from Goregaon to Borivali is underway since March 2024.