A timely warning changes Pearl Harbor's alert posture

What changes if Pearl Harbor commanders receive all the available warning information before the attack?

Ships would sortie, radar and defenses would remain fully manned, and aircraft would disperse, making the Japanese attack far less effective.

Kimmel could sortie ships able to sail and maneuver them away from the Japanese search axis. The harbor, antiaircraft defenses, and radar network would move to maximum readiness. Aircraft historically grouped together for protection against sabotage would instead disperse for air attack. These measures would transform the raid from a strike on an unready base into an opposed operation, although they could not guarantee that every ship survived.