A submarine base complex (SMBC) was commissioned on 22 August 1987 as A-14 building by the then Chief of the Naval Staff Admiral R. H. Tahiliani in Mumbai for the submarine fleet of the Western Naval Command.

[3] This operations base was expanded to include submarine support facilities and commissioned as INS Vajrabahu on 1 February 1996 by Admiral Vijai Singh Shekhawat.

[4] The base operates and maintains a sizable part of the Submarine Arm of the Indian Navy by providing material and logistic support to the Sindhughosh-class and Shishumar-class submarines based in Mumbai.

It also has a non-dieted sick bay and handles preparation and maintenance of individual escape suits for submarine personnel.

INS Vajrabahu is the seat of the Commodore Commanding Submarines (West) (COMCOS (W)).