Intensity-weighted mean LSR velocity maps (moment 1): (a) C₂H N = 4–3, (b) [C I] 609 μm, and (c) C¹⁸O J = 3–2. The green shaded areas show LSR velocities consistent with emission from the Bar. The blueish points (blue-shifted with respect to the Bar) show emission with more relevant contribution from OMC-1 in the background (e.g., DF1). The reddish points show red-shifted emission from the main velocities of the Bar PDR. We rotated the original images by 37.5^∘ clockwise to bring the FUV illuminationin the horizontal direction (from the right).