Abstract: A method and apparatus for displaying an image to an aircraft pilot (20). The method comprises: displaying, by a display (24), to the pilot (20), an image comprising guidance symbology (34) for use by the pilot (20) when landing the aircraft (2), the position of the guidance symbology (34) on the display (24) being dependent upon an output of an INS of the aircraft (2); providing, to a processor (26), an indication that the INS output is incorrect; determining, by the processor (26), a further value for the INS output and a specification of further guidance symbology (40); and displaying, by the display (24), to the pilot (20), an image comprising the further guidance symbology (40). The position on the display (24) of the further guidance symbology (40) relative to that of the guidance symbology (34) is dependent upon the difference between the further value and the incorrect INS output.

Abstract: A method for displaying an image to a pilot (20) of an aircraft (2). The method comprises, using a first value of the velocity of the aircraft (2) relative to a runway (4), displaying, on a HMD (24), an indication of a first position for an image component (e.g. a FPM) (36), the first position being the position, from the pilot's point of view, that the image component (36) would occupy if the aircraft (2) was established on a predefined glideslope (16); using a second value different to the first value, displaying, on the HMD (24), an indication of a second position for the image component (36), the second position being the position, from the pilot's point of view, that the image component (36) would occupy if the aircraft (2) was established on a different glideslope.

Abstract: A method for displaying an image to a pilot (20) of an aircraft (2). The method comprises: displaying, by a helmet mounted display (HMD) (24), to the pilot (20), an image comprising initial image components including a first image component (34); determining that the helmet mounted display (24) is offset from a desired position for the helmet mounted display (24); determining, by one or more processors (26), a specification for a further image component (50); and displaying, by the helmet mounted display (24), to the pilot (20), an image comprising at least the first image component (34) and the further image component (50). The further image component (50) has a fixed position with respect to the first image component (34) and indicates one or more alternative positions for the first image component (34).

Abstract: A method and apparatus for displaying an image to an aircraft pilot (20). The method comprises: displaying, by a display (24), to the pilot (20), an image comprising guidance symbology (34) for use by the pilot (20) when landing the aircraft (2), the position of the guidance symbology (34) on the display (24) being dependent upon an output of an INS of the aircraft (2); providing, to a processor (26), an indication that the INS output is incorrect; determining, by the processor (26), a further value for the INS output and a specification of further guidance symbology (40); and displaying, by the display (24), to the pilot (20), an image comprising the further guidance symbology (40). The position on the display (24) of the further guidance symbology (40) relative to that of the guidance symbology (34) is dependent upon the difference between the further value and the incorrect INS output.

Abstract: A method for displaying an image to a pilot (20) of an aircraft (2). The method comprises, using a first value of the velocity of the aircraft (2) relative to a runway (4), displaying, on a HMD (24), an indication of a first position for an image component (e.g. a FPM) (36), the first position being the position, from the pilot's point of view, that the image component (36) would occupy if the aircraft (2) was established on a predefined glideslope (16); using a second value different to the first value, displaying, on the HMD (24), an indication of a second position for the image component (36), the second position being the position, from the pilot's point of view, that the image component (36) would occupy if the aircraft (2) was established on a different glideslope.