That must be precisely targeted from over the horizon to within 100 yards if the missile is a kinetic or conventional explosive device.
Anti-ship missiles have on-board terminal IR or Radar guidance to precisely target the ship. A hypersonic missile would have great difficulty trying to use either effectively, or to make the incredibly small adjustments to their flight path in such a short period of time.
Sort of reminds me of that alleged Russian super high velocity torpedo. Essentially a straight shot affair.
Flight time from 300 miles away is
300 miles
——————— = 0.048 hours = 174 second
6200 mile/hour
So the ship has less the 3 minutes to defend itself. And there is nothing that is gong to shoot down a missile going mach 8. At 30 knts the ship will be within a 9000 feet of where it was at launch. I would think flight software could solve a 9000 foot problem.
A mach 1 missile launched from the same distance would need to solve a 15 mile problem. A mach 8 air breathing missile is a game changer.