Abstract: In order to solve the effect of the ship survey attitude on the single beam digital sounding data in the sea area test near the Yellow River Delta, the attitude sensor is used to effectively correct the ship survey attitude. We draw a conclusion by comparing the test data: the result of the posture correction technology correcting the instantaneous water depth of the digital sounder is compared with the result of the traditional artificial water depth curve, the median error is 0.089 m, and the difference between the areas below the 0 m line of the test section does not exceed 0.22%. The result meets the requirements of national regulations. This paper improves the accuracy of the sounding results in the sea area test and provides a technical guarantee for the application of digital technology in sea area measurement.

Key words: attitude sensing, single beam, digital sounding, estuary test, the Yellow River