| http://www.w3.org/ns/prov#value | - strument mount supports an assembly combining all types of seismic instruments used in the spread; II) a plurality of distributed seismic sources like air-guns, vibrators, loudspeakers, and the like; III) a combination of (I) and (II) where the sensor and the source may or may not be placed within/on the same instrument mount; IV) a combination of (I) and (II) wherein the hydrophone (or one of the
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