As reported by a Flight Dispatcher; a Captain's was concerned that Maintenance may need to pull a Circuit Breaker to disable the passenger map system display program in order to be in compliance with the company's directive referencing a TSA requirement for flights returning to the USA. Confusion and misinterpretation of company's security bulletins were contributors.

Narrative

Captain requested to be connected to Maintenance Control referencing a company internal bulletin that referenced the TSA's notice about onboard passenger Map displays in the cabin. Captain was requesting Maintenance to pull the map system display Circuit Breaker (CB) for his first flight returning to the USA since the 25 December 2009 incident. He wanted this done to be in compliance with company bulletin that informed Flight Crews that they may not make any announcements over U.S. Airspace regarding flight path or position over cities or landmarks. He stated that by electing to leave the map system on he is announcing to the people in back the location of the aircraft. After hearing his view on this; I think he has a good point. Because the original company bulletin did mention that the map display must be deactivated; and is no longer listed as a requirement per an email sent out stating such; quoting the TSA. I informed him that it appeared that; following the history of the company's bulletin; it appears that the intention was meant to allow the use of the map system display. He still had concerns about the inconsistency of the new security directives. Hence the Crew cannot make any announcements about location; yet the information is readily available on the map displays in front of the passengers... Maintenance had concerns about disabling the map via CB; because they did not have any Directive stating that they were allowed to do so at the Captain's discretion.