Hi gas distribution of NGC 2683. Left panel: from the D array observations. The beam size is 61′′ × 51′′. The contour levels are (1, 2, 4, 6, 8, 12, 16, 20, 24, 28, 32, 48, 64, 96, 128, 192, 264, 392) ×30 mJy/beam km s^-1 or 1.1 × 10¹⁹ cm^-2. The horizontal wedge is in units of Jy/beam km s^-1. Right panel: from the C+D array observations. The beam size is 21′′ × 20′′. The contour levels are (2, 4, 6, 8, 12, 16, 20, 24, 28, 32, 48, 64, 96, 128, 192, 264, 392) ×10 mJy/beam km s^-1 or 2.6 × 10¹⁹ cm^-2. Grayscales are in units of Jy/beam km s^-1. As in Casertano & van Gorkom (1991) we deliberately have suppressed the enhanced noise due to the primary beam correction (for comparison see Figs. C.2, C.3, B.3, and B.5).