em-trak B400 Class B AIS Transponder

The em-trak B400 AIS Class B transponder is a high powered ruggedized AIS transceiver ideally suited for offshore and professional mariners who demand superior performance, functionality and reliability. The B400 transmits at a higher power (5W instead of 2W), significantly more frequently, and using the prioritised SOTDMA radio transmission protocol. This, combined with HF-AIS technology, translates into enhanced operational performance.