通过多波束测深的基本原理、参数校正和数据改正方法的讨论,阐述了保证多波束测深精度的主要校改正方法,并在模型分析的基础上,探讨了声速剖面的结构及其时空变化对多波束测深精度的影响,指出了三个特征海区声速结构的分布特点,并提出了抑制三海区声速改正误差的可能方法及控制多波束测量中声速改正精度的措施 Based on the discussion of the basic principles of multibeam sounding, parameter correction and data correction methods, the main correction methods to ensure the multi-beam sounding accuracy are expounded. Based on the model analysis, the structure of the sound velocity profile and its temporal and spatial variation The paper also points out the distribution characteristics of sound velocity structure in three characteristic sea areas and points out the possible methods to suppress the correction error of sound velocity in three seas and the measures to control the accuracy of sound velocity correction in multi-beam measurement