For 2-way communication, the MineTracer system uses text messaging rather than voice. This is very important as it allows every miner to communicate to the surface at the same time during an emergency event. Text messaging is the best two-way communication method when dangerous gas is present and an SCSR is donned. Each miner’s location and message is time-stamped and recorded in the mine office. The Text Communicator (TC) has a 4-line LCD backlit display and 250 message menu – plenty of capacity for both safety and operations messages. Custom messages are programmable for each mine. The Text Communicator is also the tracking device. Miners are alerted to new incoming messages via the ringer and a bright flashing LED on the unit.