Assertion: frequency sonar | /r/AtLocation | general public
Facets:
value: originally
type: MANNER
Source sentences:
text: American low frequency sonar was originally introduced to the general public in a June 1961 Time magazine article, New A.S.W.[Note 1] Project Artemis, the low-frequency sonar used at the time, could fill a whole ocean with searching sound and spot anything sizable that was moving in the water.