The JSS-296/596/896 MF/HF Radio Equipment is designed for vessels navigating A2, A3 and A4 sea areas. It consists of mainly the JSB-196GM Radiotelephone, NFC-296/896 Antenna Tuning Unit (ATU), NCT-196N DSC/NBDP MODEM, NDZ-127J Data Terminal Equipment (DTE), NDF-268 Keyboard, and NAH-692/ 695/698 Power Amplifier, and it provides the optimum GMDSS system for the superior performance, compact, lightweight and highly efficient design of the units, which ensures easy operation for distress and safety calling as well as general communications.