1. A method of reconfiguration of an aircraft environment surveillance device in an aircraft including a first electronic system and a second electronic system which is redundant to the first electronic system, where each of the first and second electronic systems include at least two surveillance sets providing information related to the aircraft's environment, said method comprising: automatically presenting via an interface to an aircrew operating the aircraft surveillance information obtained by the at least two surveillance sets in the first electronic system; automatically determining if any of the at least two surveillance sets is unavailable in the first electronic system; in response to the determination that any of the at least two surveillance sets is unavailable in the first electronic system, automatically configuring the aircraft environment surveillance device to present to the aircrew surveillance information obtained by the at least two surveillance sets in the second electronic system and to cease presenting to the aircrew the information obtained by the at least two surveillance sets in the first electronic system; after responding to the determination that any of the at least two surveillance sets is unavailable in the first electronic system and after the step of configuring the aircraft environment surveillance device, automatically determining simultaneous unavailability of at least one of the surveillance sets in both said first electronic system and at least one of the surveillance sets in the second electronic system; and in response to the automatic determination of the simultaneous unavailability, automatically determining if the at least one unavailable surveillance set in the first electronic system is redundant to the at least one unavailable surveillance set in the second electronic system, and in response to the determination that the unavailable surveillance sets are not redundant, automatically selecting and presenting information obtained from available surveillance sets of said first electronic system and from available surveillance set or sets of the second electronic system that matches the unavailable surveillance set or sets of the first electronic system.