声纳定位;声波定位

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1. Determining location using sonar waves, as by Doppler-sonar (q.v.) or locating with respect to fixed sonar transponders. 2. Determining the distance between elements of a towed array by measuring traveltimes between the elements. 3. Determining the positions of ocean-bottom seismometers by timing arrivals from first arrivals in production surveying or from specific positioning shots.