global positioning systems (GPS) are the main means to ensure navigational safety of navigation. The use of AIS on the basis of GPS in high-accuracy mode (differential mode) allows you to find the relative coordinates of the vehicle with high accuracy. Determine the relative coordinates operation of a GPS in standard mode is characterized by considerable uncertainty and does not provide a maneuvering.

Increase the accuracy of relative position when using GPS in standard mode can be provided conformed dimensions under a single constellation of navigation satellites specific GPS, due to correlation of errors of coordinate, close to 1. The aim of this work is to evaluate the impact of correlation of errors of coordinate, jointly maneuvering the ships on the accuracy of determining the relative position and the possibility of increasing the accuracy of determining the relative position together maneuvering the ships using AIS.