+ SGPropertyNode_ptr _channel_in0_node;
+ SGPropertyNode_ptr _channel_in1_node;
+ SGPropertyNode_ptr _channel_in2_node;
+ SGPropertyNode_ptr _channel_in3_node;
+ SGPropertyNode_ptr _channel_in4_node;
+
+ SGPropertyNode_ptr _carrier_name_node; // FIXME unused
+ SGPropertyNode_ptr _tanker_callsign_node; // FIXME
+ SGPropertyNode_ptr _mp_callsign_node; // FIXME
+
+ bool _new_frequency;
+ std::string _channel;