How many of twelve light carriers would be available?

With twelve light carriers, how many could remain on station while others refit?

About six could be operational or readily active at a time, with the rest preparing for or undergoing refit.

Using the rule of three as a planning guide leaves roughly four ships operational, four between active service and refit, and four in refit. Careful scheduling could make part of the middle group available, while five fleet carriers add further resilience. The example shows why total hull count is not the same as deployed strength.