Upper and lower left: HIFI maps of the kinematic components of the ortho-H₂O 557 GHz line referring to the VLA 1623 outflow, labelled “Blue Wing” and “Red Wing”, respectively, and that of the quiescent gas of the “Line Core”. Specifically, the integrations of the intensity, ^∫T dυ, were over [−30, −2[ km s^-1 for the blue wing and over ] + 5, + 40] km s^-1 for the red wing. The line core is bounded within [−2, + 2] km s^-1. A deep absorption feature is observed in the range υ_LSR = [+ 2, + 5[ km s^-1. The contours outline observed N₂H⁺ (3–2) emission. Lower right: HIFI north-south strip map about the Right Ascension offset Δα = 0′′ in H₂O 1670 GHz (left) and 557 GHz (right), see also Fig. 1. The declination offsets (ΔDec) are indicated between the frames. Both data sets were convolved to a beam size of 38′′. To compensate for the observation in double sideband mode the continuum intensity, shown in shaded grey, has been divided by a factor of two.