  The paper presents a method to validate and refine the ship's route during
the voyage. The method is based on computing several characteristic
coefficients that represent and measure route properties. Thru the analysis of
the values of these coefficient, one can analyse the overall route quality and
detect possibly dangerous discrepancies between the actual route and the
planned route.The paper describes the proposed characteristic coefficients, the
process of route refinement and the method for prediction and validation of the
route's future changes.
