TYB!
>we have missiles that travel 7 times the speed of any other missiles
That'd be Mach 49 taking the Zircon missile as reference?
Zircon missile (SS-N-33): Mach 8 6,090 mph/9,800 km/h)
https://en.wikipedia.org/wiki/3M22_Zircon
Just 'cause I'm curious: What does that actually mean "hydrosonic"?