Modern opponents try to exploit low-probability failures, so weapons need more than nominal compatibility with a hull. A stabilized gun can lag behind a lively small ship or overcompensate on a large ship that proves steadier than expected. Either mismatch degrades the precision the fire-control system is intended to deliver. Older vertical-launch systems and missiles could likewise encounter problems on ships with unsuitable stability profiles. Trials measure the actual motion and vibration of the completed vessel, allowing calibration changes or, in harder cases, changes to where and on which ships a weapon can be fitted.
Notable Point · 36:37-38:31
Stability calibration and weapons fit
Gun stabilization and early vertical-launch examples show how the real motion of a completed hull can overturn paper assumptions about a weapon fit.