What counts as small-ship naval gunfire support?

The episode uses naval gunfire support broadly, extending it beyond fire delivered during an assault to include shore bombardment more generally. Its subject is how destroyers and smaller warships attacked land targets, whether or not troops were advancing at the same moment. The historical boundary is loose, with destroyers treated as roughly comparable to fourth-rate frigates. That working definition supports the later comparisons of sailing bomb vessels with interwar destroyers and aircraft.