And could you explain does Dhanush could be used to target ship target.
I'll take up your challenge:
Dhanush would work in a different way then DF-21/26, both of which are road-mobile, but need special hardened launch pads since their "hot-launch" would scorch unprepared land. Since these are land-base, and target sea-base systems, often over-the-horizon due to the US Navy's knowledge of the system's, and China's, strengths and weaknesses, they need remote sensing or near real-time electro-optical satellites for target identification and tracking. The satellites will identify the target and possibly relay target movement updates as the missile traverses its midcourse path. Once it enters into its terminal phase target readjustment becomes a near impossibility given the maneuvering of the defensive system and the speed of the AsBM.
Dhanush would work slightly differently. As noted in the above picture, this can be a sea-based weapon. As a result the IN can leverage MPAs or even ship or submarine based sensors to identify and track a prospective target. Once identified, tracking info, from a ship's radar or a P-8I's sensor suite, can be relayed to an airborne Dhanush to enact trajectory changes and keep pace with a moving, defensive target. The airborne tracking and relay concept was a staple of Soviet anti-ship warfare, as they would use TU-95s as a relay, the TU-95 would update an anti-ship missile's tracking info once they reach a certain point in their flight path, all this on route to destroying an enemy ship.
Like China, India could use remote sensing satellites or electro-optical ones, but because Dhanush can be base at sea, it has a large variety of identification and tracking options.
And could you explain as
@Mrc asked how the supersonic, or the hypersonic could achieve its deadly accuracy at such speed which means less maneuver, I understand that the speed gives the target to move from the original position very less.
They largely don't. Brahmos, P-270, CM400, these fast missiles also do most of their maneuvering during their midcourse phase. As they are identified at high-altitudes, anti-ship missiles rarely cruise while sea-skimming, it's less efficient from a fuel-economy standpoint, they will be making slight course adjustments to keep pace with a maneuvering defensive system.
Once in their terminal phase they are moving too fast to engage in any radical course changes or updates, at this point their flight path is more-or-less a straight line. But, because of the length of a terminal distance is mere hundreds of meters, this leaves a defensive system no time to maneuver, thus the reliance of CIWS systems to destroy the incoming munition.
This is the terminal phase of a P-270. Neither the missile nor defensive system could maneuver. There's simply no time.
It's the same for Brahmos, it's trajectory adjustments come during its mid-course flight path phase, so you better hope your tracking is accurate. There's no time to maneuver in tight.
I'd actually recommend a 3M-54 type of missile instead. During its mid-course it's nothing more than a Russia version of Tomahawk, a large, slow missile. But one that's slow enough that course adjustments, target changes or mission abortions can take place. Once in its terminal phase, the 3M-54 engages in a supersonic "sprint", leaving neither the missile nor defensive system with time to react or change their course.
To answer your question with less words, Brahmos and other high-speed missile get their accuracy from mid-course trajectory updates. Once in their terminal phase they are simply too fast to maneuver.
