H₂O (1₁₀ − 1₀₁) map obtained with HIFI. The data have been regridded onto a regular grid in RA and Dec. The spacing between each position is 19′′ and the map is centred on the Class 0 source VLA 1623 at α₂₀₀₀ = 16^h26^m26.4, δ₂₀₀₀ = –24°24′31′′. All spectra are plotted on the T_mb-scale and velocities are with respect to the υ_LSR (from –50 to +50 km s^-1). Note that the spectra in the enlarged insets have not been baseline subtracted, but corrected such that the offset shows the single side-band continuum level. The positions of B1 and R2 are indicated with coloured dots.