Here is the full list of all 35 1971: Indian Naval Front achievements.
INS Magar and INS Gharial have reached the destination safely.
Terminate PNS Zulfiqar.
Defend base with maximum 20% damage to Bombay Port.
Decode the third morse message.
Destroy all targets on port and base with 50% health.
Destroy all enemy ships in the region.
Destroy PNS Hangor with zero damage to landing ship.
Neutralize all enemy entities in the region to keep INS Vikrant safe.
Defend INS Vikrant.
Successfully destroyed Oil Supply resources in Karachi Harbour.
Reach close to Karachi Port in absolute stealth mode.
Destroy all enemy in the region.
Successfully escape from the firing zone.
Clear the region of all hostilities.
Destroy all Patrol Boats in the region.
Destroy all targets in the region.
100% accuracy firing Torpedos.
Successfully defended Okha Harbour from hostile Birds.
Survive enemy air-strike with greater than 40% player health remaining.
Decode the second morse message.
Successfully annihilated Karachi Harbour.
Reach close to Karachi Port in Op Trident.
Complete the mission in record time.
Complete mission with 50% health.
Destruct 80% Cox's Bazar Port.
Destroy 50% air defense systems in Cox's Bazar port.
Destroy both PNS Comilla and PNS Rajshahi patrol boats.
Destroy PNS Ghazi.
Spot the blue whale.
Decode the first morse message.
Secure the cargo ship in record time.
Successful chopper control and hovering.
Complete the first mission successfully.
Get the first kill in Campaign mode.
Perform successfull take-off and basic maneuvering.