|dc.description.abstract||Navigation in the littoral waters of Norway is based on long traditions. All naval units spend much time and effort to navigate faster, safer and tactically clever. For decades radar has been the most important tool to ensure navigation at an acceptable risk level.
After the introduction of computer based integrated bridge systems, it was possible to give the navigators a new set of tools, and it was technologically possible to do things faster and with a higher level of automation and precision. However, the introduction of new technology did not only lead to a safer and more efficient navigation. The statistics revealed that during the last decade, collisions still happened at approximately the same frequency. Most of the collisions reports express that violations of “the International Regulations for Preventing Collisions at Sea” (COLREG) occur. The reports also describe incorrect use of radar and AIS and lack of understanding of the systems.
In addition to visual evaluation, radar and AIS are the most important aids to avoid a collision. The radar is well known, but has been constantly developed. Even if AIS is relatively new, most ships have installed it, but it is not always taken maximum advantage of.
In order to investigate how radar and AIS are utilised in the Norwegian navy, the fieldwork consisted of observation of live navigation on board the Skjold class and in the simulator at NNC. In addition 19 officers were interviewed by means of a questionnaire to evaluate the level of knowledge within radar and AIS.
The findings indicate that all the different aids provided in an IBS to avoid collisions are not fully understood and not fully utilised. Some automatic functions are never used and hardly ever explored. Visual observations were the most important and most used input factors to create a SA before decisions were made. The electronic information provided by radar and AIS was not always utilised to achieve an optimal SA.
However, all potential collisions incidents in the field tests were handled in a professional and safe way.||nb_NO