“US Coast Guard / CENTCOM released photo of weapons seized aboard an Iranian dhow…The seizure included UUV and USV components. The annotations, highlighting possible UUV parts, have been added.”
As reported earlier, on January 28,2023, USCGC Clarence Sutphin Jr. intercepted an arms shipment bound for Houthi controlled areas of Yemen. Somehow, I skipped over an aspect of the report.
The boarding team discovered over 200 packages that contained medium-range ballistic missile components, explosives, unmanned underwater/surface vehicle (UUV/USV) components, military-grade communication and network equipment, anti-tank guided missile launcher assemblies, and other military components. (emphasis added–Chuck)
H. I Sutton at “Covert Shores” amplifies on the story, identifying the likely UUV as a one-way attack system. An earlier post provides a bit more detail about the likely weapon.
It appears this weapon is slow, so it is more likely to be used against vessels that are anchored or moored. It might also be used against port infrastructure. It could be launched and/or controlled from any number of innocuous looking craft. Because the effects of an underwater explosion are amplified by the non-compressible nature of water, this weapon could cause very serious damage.
In addition to the Houthi, Iran and any of its client organizations may use this weapon.
Chuck Hill's CG Blog 
I think it about time for the Coast Guard to reestablish the Sonar Technician rate. Also put some real ASW capability on all of the NSC, OPC, and FRC cutters. Back in the fifties, the Cape class cutter had sonar and ASW weapons. It was called the Mousetrap (weapon).
USNI report.