Based on the manipulating position of the electronic compass in some underwater vehicle

an error compensation method for electronic compass is proposed

which is fit for working under water.Considering the detail

segmented interzone compensation is proposed by analyzing the reason of the error

which least squared method is adopted in the error compensation in every interzone.The experimental result shows that the segmented error compensation can compensate the error of the small interzone effectively

the maximum error drops to 0.3° even better and the accuracy of the magnetism heading is improved.It can meet the demand of a navigation system with high-accuracy.