The paper presents a verification of the optoelectronic experiment based method, by means of another method using RTK GNSS techniques.

The article presents two methods of determining safe waterway parameters in con-fined waters, based on real experiments. The methods have been developed at the Insti-tute of Marine Traffic Engineering.

The paper presents mathematical modeling for the positioning of the ship’s hull and determination of the ship’s path width. The above are achieved by two non-simultaneous measurements with a pulsed laser rangefinder. The investigated area is the entrance to the port of Świnoujście.

The article presents a concept of the method of determination the horizontal dimensions of safe maneuvering area for vessels, based on laser measurements, conducted at the entrance to the Port of Świnoujście. The error analysis of the method is discussed as well

The article presents the error analysis of the method of determination the horizontal dimensions of safety maneuvering area for vessels, based on laser measurements. Some solutions of reducing these errors have been suggested as well.

The article presents the verification of the commonly used analytical method of determining the safety waterways' parameters. The verification is conducted by means of the method based on the real time experiment using the landbome laser range finder. The analysis concerns the inland passenger crafts navigating on the straight waterway lying under the Długi Bridge in Szczecin.