Air carrier Captain reported a course deviation occurred due to GPS jamming and spoofing while on an arrival in VMC conditions. There was also haze that was obstructing runway visibility.

Narrative

Due to known GPS jamming and spoofing; on arrival and in compliance with an operations alert; crossing the Nicosia FIR at point VANZA we disabled the GPS L and GPS R and enabled VOR/DME updating. After receiving a vector from Approach; we were cleared direct to ORDUN on the OSAMA6A STAR; then to MIDRU; IF; for the ILS 26R approach. On the ORDUN to MIDRU leg we received UNABLE NAV RNP EICAS and elected to continue the approach; looking visually for the airport once we turned in. With LNAV engaged we turned from IF; MIDRU; to FI26R. We then received the EICAS FMC CHECK POSITION; or something similar. We could not see Runway 26R in front of us; but could see Runway 26L and the terminal area off to the left. Due to the haze; 5000M HZ on ATIS; Runway 26R was not visible. Localizer or glideslope was not captured and we remained at 5;000 ft. Approaching the vicinity of 6 NM from the runway we could break out 26R and realized we were well right of course. The display on the ND (Navigation Display) showed us on course and aligned with the runway; but we were paralleling the runway; I would estimate 1 NM right of course. At this point Tower called and we said we had a navigation degradation and requested vectors for the ILS. We never intercepted the ground-based ILS localizer or glideslope because we had turned parallel to the final course. The vectors for the second attempt and subsequent landing were normal; ILS localizer and glideslope captured normally once established on an intercept heading.