The problem of data fusion in a navigational decision support system on a sea-going vesselhas been analyzed. The computing algorithm herein applied for solving the formulatedproblem is based on a multi-sensor Kalman filter. On the practical side, results of thetests done in real conditions are shown. The tests conducted onboard m/s Nawigator XXI,have been aimed at the verification of the proposed computing algorithm implemented ina prototype navigational decision support system.
