EM-TRAK Class B AIS Transceiver & Splitterem trak B923 AIS Transceiver 2W Class B with Splitter The B923 is a standard power 2W CSTDMA AIS Class B transceiver an integrated VHF antenna splitter that is small, light weight, yet delivers the very best AIS receive and transmit performance. You'll see more AIS information and targets at maximum range all achieved with the least power consumption. The B923 has an integrated VHF antenna splitter which enables the transceiver to share your existing