[3] Customarily held by a four-star admiral, the CNS is the senior-most operational officer of the IN, tasked with the roles of overseeing the force's overall functioning during states of peace and conflict, along with the realization of India's strategic maritime objectives, namely, the defence of the country's sovereignty against maritime threats and the security of international sea lines in the Indo-Pacific.

[6] Seated at Integrated Headquarters of Ministry of Defence (Navy) (IHQ of MoD (Navy)), stationed in New Delhi, the CNS is the senior-most operational officer of the IN, and is tasked with the following: In addition to these responsibilities, the CAS is also a permanent member of: The office's eminence in the aforementioned groups thus grants the appointee with the role to advise the Minister of Defence (Raksha Mantri or RM) on the affairs related to the IN's functioning and the promotion of an comprehensive integrated planning policy with respect to the affairs of tri-service integration, doctrinal strategy, capability development, defence acquisition and infrastructure.

[14] The move to appoint a new designate to the position usually begins several months before the change-of-command, wherein the Ministry of Defence (MoD) reviews the résumés of the IN's senior-most vice admirals, which regularly includes the Vice Chief of the Naval Staff (VCNS), the Flag Officer Commanding-in-Chiefs (FOC-in-C) of the force's three combatant commands and the Commander-in-Chiefs (C-in-C) of India's two integrated military commands.

[16] According to Part III of the IN's Regulations for the Navy, 1991 - a CNS-appointee reaches superannuation upon the completion of three years in the position or at the age of 62, whichever is earlier.

[17] However, an appointee may also be dismissed from office by the President of India before the conclusion of the tenure under the Section 15(1) of the Navy Act, 1957 and Article 310 of the Constitution.