Please be aware that when you Mentor and/or Instruct a student at a position, it is mandatory that you are in a position to take over at any time.  For example, use the following when conducting online training;   MCO_S_TWR    MCO_I_TWR/MCO_M_TWR MCO_S_APP     MCO_I_APP/MCO_M_APP       Remember that this is not optional, it is mandatory from VATUSA/VATSIM.  Failure to adhere to this policy could result in you being suspended by a supervisor.