EKİNOKS-N Simulator & Diagnostic System sends NMEA 0183 sentences that can be defined and edited by the user over user-configurable serial ports and Ethernet TCP, UDP connections. It can generate sentences provided by various navigation devices that produce data according to the NMEA/IEC61162 protocol and send these sentences to one or more receivers. With the capabilities provided by EKINOKS-N, users can easily test their own systems and devices and solve many problems they will encounter in the field beforehand. The system enables all devices used in navigation systems to be created and used in a virtual way and to monitor, record and replay the data flowing between devices on the map.