Patent ID: 8175760
Filing Date: 2012-05-08
Classification: G01C

Abstract:
1. A display method for an aircraft which follows a flight plan, wherein the display method comprises carrying out the following series of successive steps in an automatic and repetitive manner: a) calculating an actual position of the aircraft; b) determining, by a processor, at least one maximum permitted deviation about a setpoint position on a flight trajectory arising from said flight plan as a function of performance regarding accuracy and integrity of the calculating of said actual position of the aircraft and of a constraint regarding a flight zone permitted in a flight corridor associated with said flight plan; and c) presenting, on at least one viewing screen, at least one distance scale and, on the at least one distance scale, presenting at least the following: a first symbol which is fixed and which indicates said actual position which is taken as a reference position; and two indicators which respectively indicate limits of said at least one determined maximum permitted deviation, said indicators being mobile and situated with respect to said first symbol each time in conformity with the results of the calculating of the actual position of the aircraft and the determining of the at least one maximum permitted deviation carried out in said steps a) and b), respectively, wherein the display method further comprises: determining, in step b), an auxiliary deviation which illustrates a guidance performance of the aircraft, as a function of a piloting mode activated to pilot the aircraft; and presenting, in step c), two markers which indicate on the at least one distance scale limits of said auxiliary deviation on said viewing screen, said markers being mobile and situated with respect to said first symbol each time in conformity with the results of the determining of the auxiliary deviation in step b).