52. Some field units will "disappear"; you will not be able to reach them and will not know where they are or what they are doing.
COMMENT: This happens more frequently than it should! While it is not necessary to advise the NCS of your every move, it isn’t a bad idea to let the NCS know if you are going to be away from your radio for more than a few minutes. Also, if you turn your volume down for any reason...please remember to turn it back up! NC may call mobile or portable stations periodically to check on their current status. Stay alert.