Water maser spectra taken with the 100-m Effelsberg telescope on Nov. 2005, pointing towards putative nuclei of IC 694 (dash-dotted line) and NGC 3690 (dashed line), and on April 5, 2007 (4 days before the VLA D-array measurements) on a single pointing at intermediate distance between the nuclei (solid line). In this case, the Effelsberg 40″ beam covers the entire Arp 299 system.