US Coast Guard / CENTCOM released photo of weapons seized aboard an Iranian dhow on February 15 2024. The seizure included UUV and USV components. The annotations, highlighting possible UUV parts, have been added.
“The Biden administration is expanding efforts to surveil and intercept Iranian weapons being smuggled to Yemen, where Houthi militants have staged a deadly campaign of violence against commercial shipping that has proved resilient to six weeks of military strikes, said U.S. officials familiar with the matter.
The initiative seeks to map seafaring routes used by Tehran and stop the arms shipments while in transit, an acknowledgment that the Houthis are likely to pose a significant security challenge for the foreseeable future. It is part of a broader strategy that also includes sanctions and diplomatic pressure but faces constraint as essential military resources are in short supply.
This sound, to an old Coastie, a lot like what lead to the creation of Coast Guard Squadron One (ultimately 26 Point class 82-foot patrol boats) and Squadron Three (five to seven High Endurance cutters) during the Vietnam War.
At the very least expect more Coast Guard boarding teams to be operating with the Navy.
The Webber class Fast Response Cutters (FRC) are the weapon of choice here. The Navy never bothers to produce small ships suitable for the interdiction of clandestine coastal shipping, while this has always been a type common in the Coast Guard fleet. Six FRCs are already operating with the 5th Fleet out of Bahrain. They are already intercepting arms smugglers, as well as drug smugglers that finance Iranian proxy movements. The Coast Guard already has 55 FRCs and is procuring at least ten more.
Will we see more cutters assigned to 5th Fleet? They are also short of air assets. Will we see Coast Guard fixed wing aircraft searching the Arabian Sea?
Chuck Hill's CG Blog 
Sounds like Operation Market Time, to control the seaway off Vietnam, collaborating resources of USCG and USN, among others.
Exactly
The CG will be very busy with the Haitians for the time being.
There are about 20 FRCs in the 7th District alone, so I think even without moving units around, we are better prepared than we were for the Mariel Boatlift of 1980.
Given that the USN has no PCs, patrol ships nor OPVs, it looks like the USCG will be doing MORE patrolling. One can HOPE that the Navy will offer the some sort of mothership to support those patrols?
Yes, it is called a National Security Cutter.
The USN Cyclones are decommissioning at a prodigious rate. The Mk. VIes are already gone. The Navy is also decommissioning the last minesweepers in the next few years. The LCSes are not likely to make it to the Persian Gulf. This leaves PatForSWA as soon be the only surface assets permanently assigned to 5th Fleet. 6 Cutters enough to cover the Persian Gulf and Gulf of Oman? I doubt it. The Navy should cough up a hundred million (chump change in their budget) for 4 more FRCs for PatForSWA, or even with grey hulls and Navy crews. Otherwise the OpTempo for PatForSWA is going to get crazy.
The Cyclone class are all gone now, but we may see some LCS in the Area. Last I saw there was at least one there.