Left panel: VLA A-array K-band continuum image of the nuclear region of NGC 5506. Contour levels are –1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11  ×  2.1 mJy beam^-1 (1σ rms = 0.7 mJy beam^-1). The beam size is 012  ×  008. We show the positions of the optical center (blue circle, taken from Adelman-McCarthy et al. 2008), water maser emission in our VLA DnC-array (green circle) and VLA A-array (red circle) maps, respectively. The size of the bars indicates the uncertainty in the positions derived. The dotted-dashed square indicates the area covered by the VLBI map of Middelberg et al. (2004) and the magenta square the position of the brightest source, B0, in this map. Right panel: the EVN and MERLIN 6 cm image of the nuclear region of NGC 5506 by Middelberg et al. (2004). Offsets are relative to RA, Dec. The size of the beam, shown in the bottom-left corner, is 16.5 × 8.0 mas.