# The EGNOS Augmentation in Maritime Navigation +
## 5 Conclusions  
Most GNSS receivers are capable of receiving and processing EGNOS signals and can be used to support numerous applications, especially in the maritime environment. The choice of SBAS/EGNOS enabled receivers leads to obtaining better position performance; this is directly correlated with an improvement in navigation safety and an enhancement of those services based on PNT information.  
In the present work, to verify the performance EGNOS, static and kinematic data collections have been processed using EGNOS corrections available on an EDAS server. According to the presented experiments, the use of EGNOS corrections provides a more accurate positioning solution in respect to using only GPS measurements in both SPP and DGPS positioning modes. As summarized in Tables 2 and 3, evident enhancements on vertical and horizontal components of the position are provided by GPS + SBAS SPP configuration. This latter configuration also outperforms DGPS, except when measurements collected by a smartphone have been used.  
Furthermore, although there are no performance requirements on the vertical component (as defined by IMO for the horizontal one) despite its importance in different applications, this analysis was investigated in the present study. In fact, the significant enhancement obtained on a vertical component is particularly interesting for applications requiring accurate estimate of the altitude like the determination of the sea state conditions, encountered by the ship in the course of its route, starting from the survey and analysis of vessel motions [14; 21]. Indeed, the real-time knowledge of the sea spectrum is of fundamental importance for different aspects ranging from the safety of navigation to comfort on board. The obtained results highlight improvements that can be provided by EGNOS corrections for several real maritime applications. In addition, these results can represent a start point for further analysis about EGNOS services that can be suitable for maritime application, and, for example, integrity monitoring.  
Conceptualization, A.I., A.A., S.D.P. and S.G.; methodology, A.I., A.A., S.D.P. and S.G.; software, A.I., A.A., S.D.P. and S.G.; validation, A.I., A.A., S.D.P., G.C. and S.G.; formal analysis, A.I., A.A., S.D.P., G.C. and S.G.; investigation, A.I., A.A., S.D.P., G.C. and S.G.; resources, A.I., A.A., S.D.P., G.C. and S.G.; data curation, A.I., A.A., S.D.P. and S.G.; writing--original draft preparation, A.I., A.A., S.D.P. and S.G.; writing--review and editing, A.I., A.A., S.D.P. and S.G.; visualization, A.I., A.A., S.D.P., G.C. and S.G.; supervision, A.I., A.A., S.D.P., G.C. and S.G.; project administration, funding acquisition, A.I., A.A., S.D.P., and S.G. All authors have read and agreed to the published version of the manuscript.  
This research received no external funding.  
The research is supported by \"TME--Automatic Process for the Implementation of Technologies for Efficient Naval Mobility\"--technological area: \"Advanced manufacturing and transformation\", with application to the \"Intelligent Factory\" sector, Fund for Sustainable Growth--\"Intelligent Factory\" PON I&C 2014-2020 (CUP: B66G21000090005).  
The authors declare no conflict of interest. The funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript, or in the decision to publish the results.