The campaign battleships need repair and modernization. Sending them to dock immediately, however, would remove usable tonnage from an active amphibious operation in western France. The simulated effect of their absence is checked before choosing the refit window. Better future performance has to be weighed against the capability lost while a ship is unavailable.
Notable Point · 2:34:50-2:35:29
A needed refit still has an availability cost
In the campaign, the flawed battleships are withdrawn for modernization only after checking whether their absence would reduce the chance of completing the invasion of western France.