Dynamic spectra of a Type III burst observed by four spacecraft on 22-Aug-2021. The spacecraft used to record each dynamic spectrum is indicated in each panel, and the observed Langmuir waves are also annotated. Frequencies in SolO spectra suffering from perturbations were omitted during analysis. Unprocessed Level 2 data, as made publicly available, are used in this figure. The recorded signals are not calibrated, so the colours are arbitrary and do not represent the true relative strength of the signal measured by each of the spacecraft.