The difference between emergency repair and a full refit

What separates a full refit from the quick wartime repairs used to return a ship such as Yorktown to sea?

Quick repair fixes only what blocks immediate service, while a full refit renews machinery, structure, weapons, and other systems throughout the ship.

Emergency repair concentrates on the defects that prevent a ship from sailing or fighting: leaks, damaged plating, machinery failures, and other immediate casualties. The standard is sufficient safety and function for the next operation, as in Yorktown's hurried work before Midway. A full wartime refit can renew boilers, turbines, plating, weapons, and equipment when time and dockyard capacity permit. A peacetime reconstruction can go further by stripping down and rebuilding systems that still function but are worn or obsolete. The scope is therefore set by urgency and strategic availability, not simply by the amount of visible damage.