it is not needed my friend,in case of you are launching a nuclear missiles.get the current location,and fire..if high yield nuke,then it'd destroy a ship even if it lands quite a far.
as you can see,Dhanush was developed quite a long time ago.though in 2012,it was first time publicly tested.
It doesn't work like that my friend. That doesn't mean to say your approach won't work, but that approach carries far too much of inherent risk, something no professional force will accept. I'll try my best to simplify the modern process of Anti shipping for you.
The first screen consists of your spaced based ISR assets, which are very good at detecting ships. Unfortunately, due to their very short time over target, they are useless at tracking them. But nonetheless, they are useful for providing advance warning to friendly ship.
The second screen ideally consists of HALE drones and/or AWE&Cs, which are directed to pick up and keep track of the hostile ships detected by the satellites. As they make contact with the hostile ship, the co-ordinates are dispatched to available friendly ships to close-in on their hostile ships, coming to within the standoff ranges of their AShM, in this case the Dhanush.
With the target not confirmed and own AShM assets now in place, the hostile ship can now be engaged.
Fact is, without ISR assets detecting and tracking the target, it might be impossible to even bring your own assets to within firing range of your missiles. Now add that uncertainty to the fact that you are launching a Nuke, and you will realise that that would be a very dangerous plan of action.
And in any case, without ISR assets, you cannot do damage assessment. A scary thought.