The Royal Navy reports that HMS Tamar participated in an exercise off S. Korea, providing a platform for a US Navy diving/explosive ordnance disposal team equipped with Remus 100 uncrewed underwater vehicles to do mine countermeasures.
Virtually any large Coast Guard cutter could do the same thing, maybe even the Webber class FRCs. HMS Tamar would be an MEC if operated by the Coast Guard.
The Remus 100 would also be useful in reopening ports after a natural disaster, looking for changes in the underwater topography or obstructions.
This goes along with the way I think the Coast Guard should plan to do the Defense readiness mission, that is, that the Coast Guard would provide the platform and USN teams would come aboard, bringing the naval capability, whether it be mine hunting equipment, an ASW towed array and helicopter, or special ops team.