Bro, do we have any? Are we a near-peer adversary to US? Have a good look at the sheer size of Indian ocean first:
http://www.geographicguide.com/africa-maps/indianocean.htm
Subjecting massive stationary targets such as Indian cities to nuclear strikes via ballistic missiles is much easier than attacking heavily armed USN assets across the Indian Ocean which is a huge environment. Read the response of an informed individual in this link, and enlighten yourself:
https://www.quora.com/How-effective-is-DF-21-missiles-against-US-aircraft-carrier-group
Fairly good technical points in that response. We cannot just expend our strategic assets [blindly] in a war. In our case, and due to our extremely limited resources, every strike counts.
Their is massive asymmetry in the quantity and quality of USN and PN. First, understand the disparity in numbers:-
https://www.popularmechanics.com/military/navy-ships/a15297/us-navy-entire-fleet/
https://www.popularmechanics.com/military/navy-ships/a19746695/us-navy-subs-infographic/
Now, I want you to watch these educational videos:-
A single Arleigh Burke class destroyer is a fortress of a warship:
https://whitefleet.net/2017/07/31/the-arleigh-burke-class-destroyer-ddg-51-an-in-depth-guide/
Now, familiarize yourself with their strike options:-
AGM-86B ALCM range = 2500 KM
AGM-86C ALCM range = 950 KM
AGM-86D ALCM range = 1320 KM
Tomahawk cruise missile range = ~2500 KM
They have a large fleet of strategic bombers to launch ALCM. Every strategic bomber incorporate formidable electronic warfare capabilities to jam/spoof radar systems from vast distances, and B-2 Spirit is virtually invisible to any radar system anyways.
Ohio-class submarine - alone - carry
154 Tomahawk cruise missiles at a time. Enter entire USN and you are dealing with too much firepower from this spectrum alone. Now complement this layer of firepower with a large fleet of strategic bombers, and you are looking at hundreds of long-range cruise missiles heading towards your assets from multiple directions in one go and such a barrage will overwhelm your defenses and C&C capabilities.
And, even if a single nuke is fired from our side, then Ohio-class strategic submarines will spring into action:
https://nationalinterest.org/blog/t...tic-missile-submarines-the-us-militarys-22343
Ohio-class strategic submarine - alone - carry
20 Trident D5 ICBM-range SLBM. Each Trident D5 SLBM can be armed with up to 8 thermonuclear warheads. Even if they are carrying up to 6 each; we are looking at up to 120 thermonuclear warheads in a single vessel. Can you imagine the magnitude of fire and fury in this case?
And I haven't even touched the topic of USAF and vast American surveillance capabilities. Please understand that we are poor 3rd world country and in no position to challenge US in a war.
US is a much older nuclear power, and it have vastly superior experience of warfare and surveillance apparatus in place. They have fought a COLD WAR with USSR for 40+ years, and they had a doctrine of preemptive strikes in which they would take the fight to a nuclear armed force in full force before the other side can do something. They have sharpened their tools for decapitating strikes. They have vastly superior methods of monitoring stuff in real-time.
Understand this: US is the greatest superpower in existence.