Extent of line emission along the outflow direction for the selected molecular and atomic lines. Top panel: the [O i] 63.2 μm line (green filled circles), the OH 84.6 μm line (orange filled diamonds), the H₂O 2₂₁–1₁₀ line at 108 μm (blue empty diamonds), and the CO 24–23 line (violet empty circles) are shown for each object. Bottom panel: the H₂O 2₂₁–1₁₀ line at 108 μm (blue), the H₂O 2₁₂–1₀₁ line at 179 μm (light blue) are shown for all objects. Additionally, the H₂O 7₁₆−6₀₇ line at 71.9 μm is shown for IRAS4A and the H₂O 3₂₂−2₁₁ at 89.9 μm line is shown for HH46 and L1489 (all in navy blue). The X-axis shows the selected spaxel names along the outflow direction (see Fig. 3), whereas the Y-axis shows the flux normalized to the central spaxel (C) value.