Since introduction of VTS (Vessel Traffic System), considerable researches have been performed in order to secure marine safety including marine traffic analysis and safety assessment as well as vessel simulation but most of the researches relevant to existing VTS communication has a limitation of being able to obtain detailed statistics for the contents of communication data on the ground of failing to extract exact data relevant to actual communication as such researches were analyzed based on record data of VTS log book and computer data of Port-MIS program.
In other words, traffic communication data being used for existing research was not satisfactory as existing mode having been utilized for research relevant to VTS communication in terms of the fact that it was a data not reflecting communication contents as it was unable to be recorded one by one due to lack of definition for VTS communication and urgency of communication for marine traffic safety or record of some vessels including monthly fee vessels was omitted for ensuring efficiency of port operation.
Therefore, in this study, in order to collect exact and detailed data, VTS communication without its definition so far was clearly defined as 'VTS center and vessel exchange and accommodate information through VHF channel in order to ensure vessel safety, efficiency of port operation and protection of marine environment' and in order to collect data complying with an objective of research, a new data collection mode called VCDF(VTS Communication Data Frame) comprising a new traffic communication item was suggested. (the rest is omitted)