Vertical profiles of non-thermal intensity of NGC 4565 at 1.5 and 6 GHz as function of distance z to the galactic mid-plane, where positive z values are on the north side and negative ones on the south side of the mid-plane. The galactic longitude at the centre of each vertical strip is indicated below each sub-panel (1″ ≡ 58 pc). The data points correspond to the average intensity (in μJy beam⁻¹) within each rectangular box defined with BoxModels. The solid lines denote two-component exponential least-squares fits to the data (see Appendix C). In a few cases we did not use the fits to the entire vertical profile (as shown here), but instead fitted the parts at positive and negative z separately and in each case adopted the mean value of the two resulting scale heights.