Left: Averaged H I maps toward the SNRs CTB 1 and G116.5+1.1 showing the H I line emission averaged over velocity channels between ﹩v_{\mathrm{LSR}\,}=-15.5﹩ and −18.5 km s⁻¹. The H I contours (in black) start from 10 K T_B and run to 38 K T_B in 7.0 K T_B steps. Right: H I intensities averaged from ﹩v_{\mathrm{LSR}\,}=-27.5﹩ to −30.5 km s⁻¹. Contour levels are 6–46 K T_B with steps of 10 K T_B. The 21 cm radio continuum emission in both images is overlaid as white contours at 6.0 and 7.0 K T_B. The noise in the maps is 1.5 K T_B because of the averaging of images over 3 km s⁻¹.