Top panel: velocity resolved spectral profile of HF absorption observed with HIFI toward core NG C6334 I (gray histogram). The seven individual model components are the same as in Emprechtinger et al. (2012) and are drawn in dashed green lines, with their sum in solid gray. Middle panel: four foreground components expected to remain visible for lines of sight away from core I, but still on the NGC 6334 molecular cloud complex (solid blue). Bottom panel: two foreground cloud components hypothesized to be unrelated to the NGC 6334 complex (solid magenta).