Hey as per your demand here I am providing you details of Purpose of Indian Navy

About Indian navy
The Indian Navy can trace its lineage back to the Honourable East India Company's Marine which was founded in 1612 to protect British merchant shipping in the region.

Mission of Indian navy
Nuclear second strike
MDA
Sea Control
Sea Denial
Blockade
Power Projection
Expeditionary Ops
Compellance
Destruction
SLOC Interdiction
SLOC Protection
Special Ops
Protection of offshore Assets
Seaward Defense
NCAGS Ops

Purpose of Indian Navy
Influence affairs on land
Safeguard India's mercantile marine and marine and maritime trade
Safeguard India's national interests and maritime security
Deterrence against war or intervention
Decisive military victory in case of war
Security of India's territorial integrity, citizens and off-shore assets from sea-borne threat