FIELD: physics, navigation.
SUBSTANCE: invention relates to location methods and means of measuring depth of offshore zones using echo sounders. The method of determining distance from an object to an electromagnetic field source by emitting an electromagnetic field in the audio range towards the bottom, receiving the reflected signal, measuring the time interval between emission and reception of the signal and calculating, based on the obtained result, depth using an echo sounder, wherein the method further includes measuring sound speed in the range of 1400-1600 m/s, with a resolution of 0.001 m/s on the installation horizon of the emitter and the receiving antenna, as well as on n horizons on depth at fixed points, including the near-bottom horizon, using a sound speed profile recorder installed on self-contained SONOBOT-type equipment, as well as measuring water temperature, hydrostatic pressure in the range of 10, 50, 100, 300 and 600 bar and electroconductivity at the same fixed points where sound speed is measured. The echo sounder for implementing the method of determining depth at a bottom irradiation point, comprising an emitter, a receiver for receiving the signal reflected from the bottom, a duration measuring device, a reference generator and a computer with a recording device, wherein the outputs of the emitter, the receiver and the reference generator are connected to the inputs of the duration measuring device, the output of which is connected to the computer, the antenna of the receiver of the echo sounder is connected to the duration measuring device, which is equipped with a signal special point discriminator, and frequency of the reference generator is controlled as a function of the measured depth and the required measurement accuracy thereof, additionally includes a unit for generating adjustments for sound speed on n horizons taking into account hydrostatic pressure, temperature, electroconductivity and saltiness on n horizons.
EFFECT: invention improves accuracy of measuring depth using an echo sounder.
2 cl, 1 dwg
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