AWO.A.SVGS.103 CS AWO.A.SVGS.103 Minimum requirements for synthetic vision guidance system (SVGS) flight instrument displays

Pilots operating the aircraft from their normal seated position shall be provided with the following SVGS displays features and characteristics:

- (a) A clear and distinct, geographically accurate, perspective depiction of the runway of intended landing that is integrated with the SVGS scene and derived from an accepted database (see CS AWO.A.SVGS.113, 114, 115 and 116). The runway depiction shall be displayed within the positional accuracy requirements. This shall be usable by the flight crew at a minimum distance of 2 nautical miles from the runway threshold. - (b) Lateral and vertical path deviations. - (c) Command guidance display. - (d) An earth-referenced flight path vector (FPV) with a symbol that is scaled to and aligned with the SVGS scene that does not interfere with the display of attitude. - (e) A flight path angle reference cue (FPARC) referenced to the pitch scale at the desired and selected descent angle for the approach that does not interfere with the display of attitude.

- (f) Error annunciations (SVGS depiction, navigation signal integrity and excessive deviation (flight technical error)) that are displayed in the pilot's primary field of view (FOV). - (g) Alerts (warning or caution level, as appropriate) to inform the flight crew when the SVGS function is lost or degraded below the required level of performance. Any detected erroneous information shall be removed from the display. - (h) Characteristics and dynamics that are suitable and effective to enable the manual control of the aircraft. - (i) Radio altitude or equivalent display. - (j) The threshold of the runway of intended landing. - (k) Where more than one runway is depicted, a means of distinguishing the intended landing runway from other runways. - (l) A means to provide a sense of ground speed, altitude trend and direction due to aircraft movement through the depicted scene, if not inherently provided by the terrain depiction. - (m) When conforming an image to the outside world, such as on a HUD (or equivalent display), the image shall not obscure or significantly hinder the ability of the flight crew to detect real-world objects.

Coded information elements overlaid over images shall:

- (1) be readily identifiable and distinguishable for all foreseeable conditions of the underlying image and range of motion; - (2) not obscure necessary information contained in the image; - (3) be depicted with the appropriate size, shape, and placement accuracy to avoid being misleading; - (4) retain and maintain their shape, size, and colour for all foreseeable conditions of the underlying image and range of motion; and - (5) show that if there is any obscured information, it is either not needed when it is obscured or it can be rapidly recovered.

The SVGS display shall not interfere with the external visibility, interpretation and use of cues, and guidance presented on the head-down display (HDD) (primary flight display) or HUDs used for the conduct of the approach procedure.

[Issue: CS-AWO/2]