Assertion: ocean's system | /r/CapableOf | provide marine researchers
Facets:
value: with a highly useful tool
type: OTHER
Source sentences:
text: This system for detecting the presence of objects underwater by acoustic echo provided marine researchers with a highly useful tool, since sound can be detected over several thousands of km in the ocean (visible light, by comparison, can penetrate only 100 metres [about 330 feet] or so of water).