Assertion: experimental sonar | /r/ObjectUse | used for first time
Facets:
value: in the mediterranean sea
type: LOCATION
value: the year before in june
type: TEMPORAL
Source sentences:
text: The experimental sonar used in the test, Towed Vertically Directive Source (TVDS) which had the dual 600 Hz and 3 kHz transducers, had been used for the first time in the Mediterranean Sea south of Sicily the year before in June 1995.