The late campaign review turns fleet totals into a force-posture point. Britain has 66 battleships with 18 more under construction, alongside several hundred submarines and perhaps as many as a thousand. That undersea concentration makes an attack on British ports suicidal within the scenario. Here the submarines act as a standing base deterrent rather than as active raiders in the moment.
Notable Point · 3:08:39-3:10:03
Submarine-heavy port defense
A late force-count check frames hundreds of submarines as a deterrent that makes attacking British ports a suicidal naval choice.