Assertion: destroyer's speed | /r/HasProperty | mach
Facets:
Source sentences:
text: The US Naval War College has suggested that the SAMPSON radar is capable of tracking 1,000 objects the size of a cricket ball travelling at three times the speed of sound (Mach 3), emphasising the system's capabilities against high performance stealth targets.
text: The speed of Aster 30 is Mach 4 and the range is more than 80km.