Thesoundraytracingmethodcanachievehigheraccuracyindeterminingdepthsandplanpositionswithmultibeamechosoundingsystem.Indataprocessing,actualsoundspeedprofilemustbeusedinthemethod.However,themethodistoocomplicated.Inordertoovercometheshortcoming,thispaperpresentsanewmethod,thepositioncorrectionmethod.Twosituationsareconsideredinthenewmethod,namely,changeofsoundvelocitykeepsconstantgradientinwholewatercolumn(includingNlayers)orindifferentwaterlayer.
