and activation similar to that for displaying the call sign the option to enter a call sign may include an option to enter plural call signs for example a pilot may wish to monitor instructions to other flights with which he or she is associated this may come into play for example where a plurality of aircraft are departing the same air facility and are to arrive at a common destination selecting one or plural specific call signs may therefore be used to activate a functionality of displaying prompts which offer an option to display all atc system messages and alternatively another option to restrict displayed incoming atc system information to that directed to a designated call sign it will be recalled that the language conversion functionality 132 may be used to enable the system 100 to recognize a call sign spoken by an atc source so that the recognized call sign serves as an audible identification code which may correlate to that entered by the pilot into the system the functionality of limiting inputs to the display screen 22 to those directed to the entered identification code may thus be implemented fig4 shows a further control functionality which may be provided by the system 100 namely a functionality to enter a correction to displayed audible communications content in an example a partial instruction is illustrated as being displayed as text on the display screen 22 in fig4 the pilot may be provided with the ability to correct an error as he is listening using the headset 12 to the audible instructions correlating to the displayed text a graphic device such as a box 40 may be caused to appear over a portion of displayed text which is subject.