At the very short harbor range, Birmingham's 6-inch guns could damage the opposing cruisers regardless of where they were aimed. Directing them at bridges and command positions therefore communicated something more specific than ordinary battle readiness. The signal told the officers issuing orders that an attack would carry immediate personal consequences even if the British ship were ultimately destroyed. A fourth turret trained toward the shore headquarters extended that message beyond the ships themselves. In this interpretation, the gunlaying was a necessary performance that converted a seemingly futile last stand into a credible threat. Technical knowledge of range, armor, and damage shaped human perception without a shot being fired.
Notable Point · 1:03:55-1:05:58
Birmingham's gunlaying makes deterrence personal
Aiming Birmingham's guns at Japanese bridges rather than merely at hulls made the threatened cost immediate to the officers deciding whether to escalate.