Underwater Glider Navigation in a Nonhomogenous Current

Methods of underwater glider navigation (Russian name - vesoplan) in a nonhomogenous current are proposed. Existing methods are described and problems of positioning of the vesoplan in a nonhomogenous current is stated. Use of method of dead-reckoning and its peculiarities are justified. Conclusion is made that, in this case, dead-reckoning is impossible without current field identification. Principles of current field identification and the algorithms based on them are described