Assertion: buoy | /r/Synonym | lagrangian drifters
Facets:
value: at the depth
type: OTHER
value: whilst collecting surface and subsurface measurements
type: TEMPORAL
Source sentences:
text: Buoys that track surface currents in this way are called Lagrangian drifters and track ocean currents at the depth corresponding to the length of their drogue whilst collecting surface and subsurface measurements.