Noise level as a function of resolution for the HALOGAS, THINGS, and MHONGOOSE surveys. The blue curve shows that the MHONGOOSE survey has a flat noise distribution, meaning equally sensitive imaging can be obtained over a large range of resolutions between ∼6″ and ∼90″. The dashed brown curve shows the HALOGAS survey, with an optimal sensitivity at around ∼20″. The dashed red curve represents the THINGS survey. This is a combination of three separate VLA array configurations (also shown at the top of the plot calculated using the correct relative observing times). THINGS has optimal sensitivity at around ∼15″ and ∼50″. All noise values are calculated over a 5 km s⁻¹ channel.