1.
n. [Geophysics]
A method of calculating the position of marine
seismic equipment. Range measurements are made whereby distance is equal to
acoustic signal
traveltime from transmitter to
hydrophone multiplied by the speed of sound in water. When sufficient acoustic ranges with a proper
geometric distribution are collected, location coordinates x, y and z of the marine seismic equipment can be computed by the method of trilateration (measuring the lengths of the sides of overlapping triangles). Acoustic positioning is commonly used in towed
streamer and
ocean-bottom cable seismic acquisition modes.