The worst Pearl Harbor outcome was an attempted occupation

What would have been the worst-case outcome if the US carriers were in port during the Pearl Harbor attack?

Repeated attacks followed by a landing that captured Pearl Harbor would create a severe basing crisis, though Hawaii's air and coastal defenses made this a demanding operation.

The worst hypothetical outcome is repeated air attacks followed by a Japanese landing that captures Pearl Harbor. American ships at sea would then face uncertainty about whether they could reach another base. Hawaii's defense plan used aircraft to weaken an approaching enemy before coastal guns engaged at close range. An attacker would need enough firepower and carrier support to overcome that defense.