What a comic show!
Kiddo, the cruise missile is going to attack a land target eventually right. There's no technology on earth that can detect every launch. You have developed no concept of geography, horizon, distances, detection capabilities in real world. Learned names of few weapon systems and having an illusion of security. Forget detecting submarines or it's launches, did you ever bothered why India couldn't provide a satellite photo of POST balakot strike ? Or Pre-strike for that matter ? A fixed target on earth. Are you one of the delusional ones that believes that F-16 was shot? If yes then why india miserably failed to give a single satellite photo of supposedly shot down F-16 debris ? They knew exact coordinates (as they showed powerpoint presentation and pointed to specific coordinates). So satellite can NEVER scan all the area. You need a million satellites to cover everything. You need probably a 100s of thousands of MQ9s to cover as big coastline as India's and even that wouldn't be enough. I am practically seeing someone living in fool's paradise.
I mean that's seriously hilarious that few delusional indians think they have some sort of missile shield. This is probably the biggest joke in defense forums ever. I mean literally ZERO knowledge about real world. There's no such thing possible with geography as big as india kiddo. Russia with all short range defenses, S-400s etc etc couldnt defend airbase in crimea.
As far as effectiveness of cruise missiles are concerned, these are going to hit a ground target in india 9 out of 10 times. I am being generous literally. Ground has complex terrain, you got huge geography with 1000s of miles to cover. Detecting a terrain-hugging missile and shooting it down is a daunting task. There will be hundreds or thousands of missile exchanges and airforces will majorly be busy with each other. Thinking of an illusion of a shield is just hilarious.
There's a reason why United States ALWAYS use Tomahawk cruise missiles to hit land targets. Cruise missiles are vulnerable in only few scenarios, like if its Anti-ship cruise missile and going towards a warship. Then ships are usually heavily defended, its a platform on a sea, it has to be packed with every sort of defense to protect it. But if CM is fired towards a land target then there's nothing stopping it. You can't pack every ground location in land with warship like defenses. The target isn't moving too, its fixed coordinates.
You shouldn't have said such things, after humiliation of indian brigade headquarters being targetted by stand off weapons at height of indian air defense. All that with video proofs. No air-defense, nothing fancy, no technology, no satellite stopped it. But yes you hit your own heli in panic. So be sure whenever there's going to be exchange of missiles, every missile is going to hit a target. India isn't a tiny space like Israel, try to understand.