# Improving Ship Maneuvering Safety with Augmented Virtuality Navigation Information Displays
## 4 Conclusions
The results of the simulation experiment indicate that the display of the real navigational situation by the AV method in five variants out of six increases navigational safety, while in the remaining variant, the difference of the values of the parameters of the compared criteria is not statistically significant (the mean distribution of resultant speed at the moment of the container ship contact with the fender and the random variable of maneuvering time do not differ significantly with the mean distribution of the same variables obtained for the variants using only visual observation and other systems). The results of the analysis led to the formulation of the following general conclusions concerning the presented method:  
1. It is possible to display a real navigational situation using 3D models of the ship and the environment generated in real-time. 2. The algorithms applied in the models enable the simulation of natural phenomena determining the real perception and assessment of the environment by the navigator. 3. The AV technology used in the method is applicable in restricted areas, not open waters. 4. The method enables the application of models used for the support of the navigator's decision that are unavailable (cannot be implemented) in current solutions. 5. The method has no significant impact on navigational safety indicators (it does not increase the situational awareness of the navigator) when: 1. the place of ship's hull contact with the collision object remains within the sight range and is visible for the navigator; 2. the lines of cross- and longitudinal sections of the hull and the collision object in the surroundings at the point of contact have an uncomplicated, exactly or roughly rectangular shape. 6. The method has a significant impact on navigational safety indicators (enhances the situational awareness of the navigator) when: 1. the place of ship's hull contact with the collision object is not in the observer's sight (is in an obscured or inaccessible place) or the prevailing conditions of reduced visibility exclude visual observation; 2. the lines of cross- and longitudinal sections of the hull and the collision object in the surroundings at the point of contact have a complex shape, different from the rectangle or where in the orthogonal top view, the edge of the ship's contact with the collision object is obscured by any sectional plane (of the ship or object). The developed method of AV-based navigational information display is universal and has wide applicability because:  
1. it can be applied in any integrated navigational system for the dynamic visualization of a real navigational situation during maneuvering in a restricted area, including MASS;2. it can be applied in a navigational-maneuvering system for dynamic visualization of the simulated navigational situation in the process of navigators' training. 3. prototype of the system with the implemented method has wide development potential. Possible modifications of the developed system architecture (the developed prototype is a basic version, due to the limitations of modern solutions used on ships and in port infrastructure) offer broad applicability in modern, future marine traffic engineering systems and UMV. Conceptualization, R.G. ; methodology, R.G. ; validation, R.G., B.M. and M.P. ; formal analysis, M.P. ; investigation, B.M. ; data curation, R.G. ; writing--original draft preparation, R.G., B.M. ; writing--review and editing, B.M. ; visualization, R.G. and B.M. ; supervision, M.P. ; project administration, R.G. All authors have read and agreed to the published version of the manuscript. This research received no external funding. Not applicable. Data Availability Statement: Data available on request from the authors. The authors declare no conflict of interest.