Comparison of the projected rotational velocity between different Nodes. Top left panel: compares ROBGrid to all other Nodes. To avoid too many overlapping points, the ROBGrid values have been slightly shifted from their true value. Top right panel: compares the ROB Node with the MGNDU and Liège results, which cover the cooler stars analysed by WG13. Bottom left panel: range of higher temperatures by comparing the ON Node with the Liège, LiègeO, and IAC results. Bottom right panel: compares IAC to Liège, LiègeO, and Mntp, which cover the range of highest temperatures. Typical 1σ uncertainties on the projected rotational velocity are 15%.