WSRT H i channel maps of NGC 6946, its companions, and the H i filament from Boomsma et al. (2008). The grayscale represents the WSRT data with units of mJy beam ⁻¹ at 64'' resolution on a logarithmic scale. The contours show the WSRT data when convolved to the GBT beamsize and are at −2σ, 2σ, 3σ, 5σ, 10σ, 25σ, 50σ, 100σ, and 200σ, where σ = 1 mJy/GBT beam. A filamentary feature is clearly visible, but it is about an order of magnitude fainter than seen in the GBT data.