^^^
Pratik Saar,
The idea is not just to follow the sub but also to kill it if it tries to launch an missile....
BTW, the areas that you are talking about are our backwaters where IN maintains a strong surveillance
and operational capabilities. Its not trivial to just come there and start lobbing missiles.
Also, its said the best weapon against a submarine is a submarine. Hence the need for tailing
SSBNs with SSNs. Something that USN subs used to practice against Soviet SSBNs during cold-war.
Furthemore, if you want to protect the cities, why again would we be looking at ship-based ABM?? Wouldn't
fixed sites serve the purpose. And then its no longer boost phase interception is it?
The ideas that have been expressed above are nothing fancy.
These things might actually be better explained in books rather than online forums.
Coming back to boost-phase BMD, I think the
Air-launched Hit-to-kill system is pretty interesting initiative.
Given the case that we have a realistic chance of having control of air over the land
of the pure, it might be feasible to have packs of Su-30s maintaining missile defense orbits over
suspected launch sites.
~Ashish