Designed with a black box plus a MKD, more stable with high performance and easy to install & operate. Compliance with IMO, ITU-R, IEC related standards, certified by CCS. Provide real-time information for collision avoidance, and text-to-speech broadcast. User-friendly intuitive HMI & preloaded worldwide reference map. Convenient to achieve regular charts and software upgradewith free of charge via USB-disk. Wide range & isolated voltage design, safety and stable. I/O ports full-function design, easy to connect & adapt with ENC, RADAR and so on.