METHOD FOR POSITIONING AN AUTONOMOUS UNDERWATER VEHICLE IN THE DEEP SEA Russian patent published in 2023 - IPC G01S3/80 

FIELD: navigation.

SUBSTANCE: invention relates to methods for determining the location of autonomous underwater vehicles in the deep sea, as well as under ice. The acoustic receiver of an autonomous underwater vehicle is synchronized with long-term coastal sonar beacons, is equipped with an acoustic receiver of navigation signals and a device for calculating coordinates, in whose memory the exact coordinates are entered for each sonar beacon, as well as electronic copies of the emitted low-frequency noise-like signals in these areas, taking into account their seasonal-diurnal variability. On board the underwater object, a sound velocity meter is installed, connected with the object control system, the underwater sound channel is detected, the object is brought to the axis of the underwater sound channel, kept there, the navigation signals of the beacons are received and the object is positioned, calculating the distance to each beacon according to the received data.

EFFECT: improved AUV positioning accuracy.

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