AIS, AIS system, AIS receiver, marine AIS, AIS Transmitter, Class B AIS, Class A AIS, AIS products, Boat AIS, Marine AIS HUAYANG[Class B Marine AIS]FEATURESGolden box AIS transponder with built-in GPSSelf-developed viewer program: ... BER 1%Blocking84dB for Signal @ -104dBm; BER 1%GPS RECEIVERReceiving Channels12 ChannelsAcquisition Sensitivity-140dBmTracking Sensitivity-150 dBmPosition Accuracy< 2 ...