For use every ten or twelve years or so? Kind of a waste of resources, don't you think? The U.S. Navy should be able to provide assets at times like this.
I don't know, which is why I asked the question.
We have had incidents far more frequently than "every ten or twelve years" where a FEMA capability could have been useful.
Just off the top of my head...Katrina, recent flooding around Baton Rouge, Harvey in Texas, and now Irma in Florida. These are just the ones directly affecting my immediate family.
Here is a list just of hurricanes:
https://www.mapsofworld.com/hurricane/dates.html
Certainly use of Naval vessels is a good thing, but a vessel specifically equipped for the purpose might prove useful.