An aircraft display system deployed onboard an aircraft, the aircraft display system comprising: at least one cockpit display device ; and a controller operably coupled to the cockpit display device, the controller configured to: generate a Primary Flight Display (PFD ) and Horizontal Situation Indicator (HSI) graphics on the at least one cockpit display device; selectively switch operation of the PFD between (i) a heading-centered display mode in which the PFD is centered with respect to a current heading of the aircraft and (ii) at least a first non-heading-centered display mode, the first non-heading-centered display mode being a split-centered display mode in which the PFD is centered on an intermediary point between the current heading and the current track of the aircraft; and when the PFD operates in the first non-heading-centered display mode, produce the HSI graphics to include a compass graphic and at least one movable HSI symbol identifying a current heading of the aircraft; the aircraft display system being characterized in that : the HSI graphics are generated to include a PFD centering marker , which moves with respect to the compass graphic to identify a point on which the PFD is centered when operating in the split-centered display mode. at least one cockpit display device ; and a controller operably coupled to the cockpit display device, the controller configured to: generate a Primary Flight Display (PFD ) and Horizontal Situation Indicator (HSI) graphics on the at least one cockpit display device; selectively switch operation of the PFD between (i) a heading-centered display mode in which the PFD is centered with respect to a current heading of the aircraft and (ii) at least a first non-heading-centered display mode, the first non-heading-centered display mode being a split-centered display mode in which the PFD is centered on an intermediary point between the current heading and the current track of the aircraft; and when the PFD operates in the first non-heading-centered display mode, produce the HSI graphics to include a compass graphic and at least one movable HSI symbol identifying a current heading of the aircraft; the aircraft display system being characterized in that : the HSI graphics are generated to include a PFD centering marker , which moves with respect to the compass graphic to identify a point on which the PFD is centered when operating in the split-centered display mode. generate a Primary Flight Display (PFD ) and Horizontal Situation Indicator (HSI) graphics on the at least one cockpit display device; selectively switch operation of the PFD between (i) a heading-centered display mode in which the PFD is centered with respect to a current heading of the aircraft and (ii) at least a first non-heading-centered display mode, the first non-heading-centered display mode being a split-centered display mode in which the PFD is centered on an intermediary point between the current heading and the current track of the aircraft; and when the PFD operates in the first non-heading-centered display mode, produce the HSI graphics to include a compass graphic and at least one movable HSI symbol identifying a current heading of the aircraft; the aircraft display system being characterized in that : the HSI graphics are generated to include a PFD centering marker , which moves with respect to the compass graphic to identify a point on which the PFD is centered when operating in the split-centered display mode. <EOS>