The Commodore Commanding Submarines (West) is an operational appointment in the Indian Navy.

The COMCOS (W) is a one star officer holding the rank of Commodore.

With this, the 9th submarine squadron was formed and was based on the west coast, in Mumbai.

In April 1987, the post of Commodore Submarines West (COMSUB (W)) was created.

Later that year, the appointment of COMSUB was re-designated Commodore Commanding Submarines (COMCOS).