Well we could keep them as old stock's in case we need to refurbish for faster maneavuers against a bigger opposition.
We could break down and sell as military items.
We could scrap.
We could turn them into deep water resource mining vessel's. Which I would go with, as they are operational, easily transferable to war time opposition and they can be leased or even sold out to folks who need to catch up with the Communist Chinese and Russian's who are at a massive huge lead in ocean resource mining. That is what I would do.
They could be used as tugs and operation commands for the resource platforms and also binds that hold the resources. This then might be a feasible option. I mean if the Rusky's and Commy's Chinese are doing it we should keep in competition.