▁are ▁used ▁to ▁can ▁cause ▁a ▁similar ▁ill usion ▁in ▁the ▁last ▁part ▁of ▁the ▁approach . ▁ ▁U ps lop ing ▁terrain ▁or ▁narrow ▁or ▁long ▁run way ▁ ▁A ▁final ▁approach ▁over ▁an ▁ups lop ing ▁terrain ▁with ▁a ▁flat ▁run way , ▁or ▁to ▁an ▁unus ually ▁narrow ▁or ▁long ▁run way ▁may ▁produce ▁the ▁visual ▁ill usion ▁of ▁being ▁too ▁high ▁on ▁final ▁approach . ▁The ▁pilot ▁may ▁then ▁increase ▁their ▁rate ▁of ▁descent , ▁position ing ▁the ▁aircraft ▁unus ually ▁low ▁on ▁the ▁approach ▁path . ▁ ▁Down s lop ing ▁terrain ▁or ▁wide ▁run way ▁ ▁A ▁final ▁approach ▁over ▁a ▁down s lop ing ▁terrain ▁with ▁a ▁flat ▁run way , ▁or ▁to ▁an ▁unus ually ▁wide ▁run way ▁may ▁produce ▁the ▁visual ▁ill usion ▁of ▁being ▁too ▁low ▁on ▁final ▁approach . ▁The ▁pilot ▁may ▁then ▁pitch ▁the ▁aircraft ' s ▁nose ▁up ▁to ▁increase ▁the ▁alt itude , ▁which ▁can ▁result ▁in ▁a ▁low - alt itude ▁st all ▁or ▁a ▁missed ▁approach . ▁ ▁Other ▁ ▁Black - hole ▁approach ▁▁ ▁A ▁black - hole ▁approach ▁ill usion ▁can ▁happen ▁during ▁a ▁final ▁approach ▁at ▁night ▁( with ▁no ▁stars ▁or ▁moon light ) ▁over ▁water ▁or ▁un lit ▁terrain ▁to ▁a ▁light ed ▁run way , ▁in ▁which ▁the ▁horizon ▁is ▁not ▁visible . ▁ ▁As ▁the ▁name ▁suggests , ▁it ▁involves ▁an ▁approach ▁to ▁landing ▁during ▁the ▁night ▁where ▁there ▁is ▁nothing ▁to ▁see ▁between ▁the ▁aircraft ▁and ▁the ▁intended ▁run