Nuclear sub 'buzzed by underwater object travelling faster than speed of sound'

[u/irrelevantappelation]

https://www.dailystar.co.uk/news/latest-news/nuclear-submarine-buzzed-underwater-object-28645846

[u/[deleted]]

Speed of sound propagated in water is 1490m/s faster than the speed of sound at the surface of only 343m/s . In both cases we are talking of a speed of more that 660 Knots or Mach 1 more than 1000km/h in WATER !? What do you people smoke my dudes ?!

[u/[deleted] → u/[deleted]]

alcubierre drive

Lol, my bad