2013 spectrum of NGC 5548. The vertical axis is the flux in units of 10^-14 erg s^-1 cm^-2 Å^-1, and the quasar-rest-frame and observer-frame wavelengths are given in Angstroms on the top and bottom of each sub-plot, respectively. Each of the six kinematic components of the outflow shows absorption troughs from several ions. We place a vertical mark at the expected center of each absorption trough (following the velocity template of Si iv and N v) and state the ion, rest-wavelength and component number (C₁–C₆). We also assign a color to each component number that ranges from blue (C₁) to red (C₆). Absorption lines from the ISM are likewise marked in black with dashed lines.