METHOD FOR UNDERWATER VEHICLE OBSERVATION Russian patent published in 2021 - IPC G01S3/80 

FIELD: underwater object detection.

SUBSTANCE: invention relates to methods for navigation of autonomous underwater vehicles (UV), specifically to hydroacoustic methods for determining the location of the UV using underwater acoustic beacons. Essence: instead of an active acoustic beacon emitting sonar signals, a passive underwater landmark is used in the form of a sound-reflecting body in the form of a corner reflector installed using buoyancy, an anchor and an anchor cable at a distance of 5-10 m from the bottom of the sea, whose recognition according to the active sonar is carried out depending on its immobility, a known distance of the sound-reflecting body from the bottom, its known geometric dimensions, a known magnitude of the target force at the radiation frequency, while approach to the acoustic beacon is carried out up to a distance of, at which the calculated circular RMS error of determining the coordinates of the underwater vehicle will be less than the specified value.

EFFECT: reducing the cost, increasing the time and reliability of the acoustic beacon.

1 cl, 4 dwg