The opening campaign-management moment weighs research priorities for a fleet that already has an undersea advantage. The options include submarine hulls, submarine improvements, and ASW depth charges, but ducted propellers win because the opposing fleets do not yet match the British submarine force. The comparison also separates useful intelligence about rival numbers from detailed specifications that matter only when they support a concrete capability or sales case. The best next technology is the upgrade that fits the current balance of forces, even when another option appears more dramatic.
Notable Point · 2:13-3:54
Propulsion research over submarine upgrades
A research choice favors ducted propellers because the fleet already has submarine superiority and needs practical propulsion gains more.