The science of navigation is one of the key technologies for Underwater Vehicles. The accuracy, continuity and real-time properties of navigation device are regarded as vital factors concerned the successful completion of certain assignment of AUV. As a main measurement technology for underwater navigation, INS (Inertial Navigation System) has not been used widely due to its high price, as a result, low cost assistant forms of navigation are receiving more and more attentions recently. Therefore the ...