Continuum-subtracted [O I]₆₃ maps of Cep E, HH 1, HH 212, and L1551 IRS5. The black circle shows the FWHM spatial beam size in the blue channel of the FIFI-LS instrument. The light green stars indicate the position of the respective jet-driving source. Schematic views are presented in Fig. D.1 of the Appendix. Contour lines are drawn in magenta in logarithmic scale at three intensity levels (IL). Cep E: RI, RII, BI, and BII are the infrared knots seen in the Spitzer/IRAC band-two (4.5 μm) image of Cep E (see Gusdorf et al. 2017). IL: (0.10, 0.21, 0.45)×10⁻¹³ erg s⁻¹ cm⁻². HH 1: yellow crosses indicate the positions of a few selected optical knots (Bally et al. 2002). IL: (0.06, 0.13, 0.28)×10⁻¹³ erg s⁻¹ cm⁻². HH 212: yellow crosses indicate the positions of the prominent H₂ knots (Zinnecker et al. 1998). IL: (0.053, 0.062, 0.074)×10⁻¹³ erg s⁻¹ cm⁻². L1551: the brightest near-infrared [Fe II] knots (PHK1, PHK2, PHK3) are marked as red crosses (Pyo et al. 2002). IL: (0.20, 0.32, 0.50)×10⁻¹³ erg s⁻¹ cm⁻².