Iran’s Shahid Soleimani Catamaran Missile Corvette and Torpedo Armed RHIB

Iranian torpedo armed RHIB carried by Shahid Soleimani class catamaran corvette.

Covert Shores reported on new Iranian missile armed catamaran corvettes, but the report also included the photo above. What we are seeing is a boat suspended from the stern of the corvette. The boat is equipped with what appears to be a torpedo tube for a lightweight torpedo. Presumably there is a second tube on the other side. Diameter is likely to be the same as the NATO standard, 324mm or 12.75″. Unlike most lightweight torpedoes, this is unlikely to be intended for use against submarines. Almost certainly, it is intended for use against surface ships.

There is not a lot of public source information about Iranian torpedoes but their partners in crime, Russia and China, are both believed to have cloned the US made Mk46 torpedo and both passive and active acoustic and wake homing technology is readily available. Passive acoustic homing in the search phase, and wake homing in the terminal phase, seems likely. Range is probably at least 8,000 yards.

This means, these torpedoes can be launched from well outside the effective range of typical Close In Weapon Systems (CIWS) of 20 to 40mm. 

We can’t take much comfort in the fact that the warhead of these torpedoes would be about 100 pounds. That is way less than the approximately 600 pounds of a heavy weight 21″ torpedo like the Mk48, but the effects of an underwater explosion are not linear. The effect of a 100-pound warhead is about half that of heavy weight torpedoes that we have repeatedly seen break ships in half. So, a lightweight torpedo, exploding under the keel, might not break a ship in half, but it is going to hurt.

I have long felt an anti-surface light weight torpedo like this would provide Coast Guard cutters a relatively low-cost way to forcible stop a medium to large vessel, regardless of size, a capability they do not currently have. Apparently, the Iranians think it will work.

Shahid Soleimani Catamaran Missile Corvette:

This is a significant departure for the Islamic Revolutionary Guard Corps. Apparently, they have recognized that their naval swarm forces are vulnerable to attack from the air, and, I believe, particularly helicopters.

hIran Shahid Solemani class corvette top view

With its array of VLS AAW weapons, these corvettes constitute a serious threat to USN and allied helicopters that might be used to counter Iranian swarm tactics.

When engaged in force protection, if the force protection package includes aircraft, and one of this class shows up, a PATFORSWA Webber cutter class might be doing useful service, if they take station a couple hundred yards behind the corvette and maintain a fire control solution on that probably highly flammable and explosive collection of weapons in the center of the superstructure, behind the bridge–without pointing the gun, of course.

Fincantiari of Italy Builds Two Small but Powerful OPVs

The Qatari Navy OPV is about 63 meters long, 9.2 meters wide, with a maximum speed of 30 knots. Giorgio Arra picture.

Naval News has done a couple of posts on a pair of Offshore Patrol Vessels (OPV) built in Italy for the Qatar Emiri Naval Forces by Fincantieri (owner of Marinette Marine in Wisconsin):

These are not your typical OPV. They look more like FAC(M) i.e fast attack craft, missile, but they trace their linage back through the UAE’s Falag 2 class to the Italian Coast Guard’s Diciotti class. Let’s compare to a typical OPV and talk about why they are so different.

First what is a typical OPV?

  • Displacement: at least 1,500 tons full load, typically less than 3,000
  • Length: at least 75 meters (246 ft), typically less than 100 meters (328 ft)
  • Range: at least 3500 nautical miles, typically 5,000 or more
  • Endurance: at least three weeks
  • Speed: 20-25 knots
  • Aviation: At least flight deck for medium helicopter
  • Boats:  at least two RHIB of 7 meters or larger
  • Weapons: one deck gun of 76mm or less plus two to four guns .50 cal to 30mm guns with one or two typically mounted in remote weapon stations. Anti-Ship Cruise missiles are rare and Anti-Aircraft missile systems more capable than MAPADS rarer still.

Examples include ships building or in service with Argentina, Australia, Britain, India, Japan, Malta, the Philippines, Singapore, Türkiye, the Fassmar designs used by Chile, Colombia, and German, and Damen designs used by Malaysia, the Netherlands, Pakistan, and Vietnam.

The 270 foot Bear class WMECs fit the profile pretty well, if you ignore the fact they can’t quite reach 20 knots. In some respects they are still more sophisticated that some of the newer OPVs.

The 210 foot Reliance class WMECs fall outside the current norm, being smaller and slower than typical, but they otherwise fit the profile. Of course even the newest is 53 years old.

Now let us compare the new Qatar OPV.

Range/Endurance:

Their range is only 1500 nautical miles at 15 knots, that is even less than that of the smaller Webber class cutters’ 2500 at 14 knots. Their seven day endurance is more typical of the smaller Inshore Patrol Vessel class. As a patrol vessel, it is closer to the Webber class WPCs than even the Reliance class.

Persian Gulf. US Government work product in the public domain.

Geography is the reason. Qatar’s coast line is only 563 km and its EEZ is 31,819 sq km (that of the US is 11,351,000 sq km, 357 times greater). They just don’t have to go very far. It may also be that these ships will be used more in reaction than as actual patrol vessels.

Size:

Full load displacement is 725 tonnes, with a length of 63.80 (209 feet) (59.60 meters or 195.5 feet between the perpendiculars) and a beam of 9.20 meters/30 feet. This makes them smaller than the Reliance class and only about half the size of the smallest of the typical OPVs. Rough seas are probably less of a concern than in more open areas.

Speed:

Their speed of 30 knots, rather than the typical 20 to 25, also seems to suggest their role is one of rapid reaction rather than persistant patrolling.

Aviation:

Unlike most modern OPVs, there is no apparent provision for supporting aviation assets, not even UAS. That is presumably because land based air is always close.

Starboard quarter of second Musherib-class OPV “Sheraouh” for the Qatar Emiri Naval Forces. Visible are the ship’s boat, two twin Exocet launchers and two 30 mm Marlin-WS secondary gun systems. Picture by Luca Peruzzi

Boats:

The OPV has a stern area with crane for launch and recovery of a RHIB. This is not an arrangement that suggests the boat would be used frequently or that boat ops is a high priority.

The second Musherib-class OPV “Sheraouh” for the Qatar Emiri Naval Forces. Fincantieri picture.

Amaments:

“…in addition to the NA-30S Mk2 FCS for the Leonardo Super Rapido 76/62 mm Multi-Feeding main calibre gun, the Leonardo-provided  EO/IR suite also includes two SASS IRSTs and a single Medusa Mk4B FCS for the two 30 mm Marlin-WS secondary gun systems. The missile armament package also includes two four-cell VLSs for the MBDA VL MICA surface-to-air system in the bow area and two twin-launchers for the MBDA Exocet MM40 Block 3 anti-ship missiles in the stern area.”

The Persian Gulf is a rough neighborhood. Qatar faces Iran across the relatively narrow Gulf. Potentially hostile craft are always close. Shore based anti-ship cruise missiles are always within range. Iranian surface units are at most only hours away, aircraft and missiles only minutes.

The vertical launch MICA missile system and Super Rapid 76mm gun provide credible defense against aircraft and cruise missiles.

While normally I would not feel four Exocets would be enough to provide two salvos of adequate size, against the potential Iranian opposition, four are probably adequate for two engagements.

It is not surprising these ships are better armed than any US Coast Guard cutter, including the more than six times larger National Security Cutters. They may be the most heavily armed “OPVs” in the world.

Two four-cell VLSs for the MBDA VL MICA surface-to-air system mounted between the bridge and a Leonardo 76mm gun forward. Picture by Luca Peruzzi

USCGC Robert Goldman (WPC 1142), Bound for Bahrain, To be Commissioned 12 March, 2021

Phoro: Sister ship, the Charles Moulthrope (WPC 1141), delivered on Oct. 22, 2020, and commissioned on Jan. 21

Below is an Atlantic Area news release. USCGC Robert Goldman (WPC 1142) is the 42nd Webber class WPC and is expected to be one of the first two of six to join PATFORSWASIA, replacing six 110 foot WPBs currently homeported in Bahrain.

united states coast guard

News Release

U.S. Coast Guard Atlantic Area
Contact: Coast Guard Atlantic Area Public Affairs
Contact: (757) 452-8336
Atlantic Area online newsroom

U.S. Coast Guard to commission 42nd Fast Response Cutter

USCGC Robert Goldman Seal

Key West, Fla. — The U.S. Coast Guard will commission the USCGC Robert Goldman (WPC 1142), Patrol Forces Southwest Asia’s second Sentinel-class cutter, into service at Coast Guard Sector Key West, Friday at 10 a.m. EST.

Due to COVID mitigation, in-person attendance is limited. Anyone interested in viewing the ceremony livestream may do so at http://bit.ly/WPC1412Com, clicking on the image at the top, or by clicking here

Vice Adm. Scott Buschman, deputy commandant for operations, U.S. Coast Guard, will preside over the 42nd Sentinel-class cutter ceremony. Mrs. Eleanor Goldman is the ship’s sponsor.  

The Robert Goldman is the second of six FRCs planned for service in Manama, Bahrain. The cutter is named after Pharmacist’s Mate 2nd Class Robert Goldman, remembered for heroic and selfless actions as a member of the joint forces serving in the Pacific theater during World War II. 

The Coast Guard took delivery of Robert Goldman on Dec. 21, 2020, in Key West. They will transit to Bahrain later this year with their sister ship, the Charles Moulthrope (WPC 1141), delivered on Oct. 22, 2020, and commissioned on Jan. 21, in Portsmouth, Virginia.

Are PATFORSWA WPBs Being Equipped With a Target Designation System?

Crewmembers aboard the U.S. Coast Guard cutter USCGC Adak (WPB-1333) raise the American flag. Adak is assigned to CTF 55, supporting maritime security operations and theater security cooperation in the U.S. 5th Fleet area of responsibility. U.S. Coast Guard photo by Seaman Frank Iannazzo-Simmons

NavyRecognition has some more details about the multi-unit exercise that prompted recent Iranian harassment of Navy and Coast Guard vessels, “U.S. Navy Surface Forces and Army Helicopters Conduct Live Fire Exercise in North Arabian Gulf.”

The ships involved in the event included Navy Expeditionary Landing Base ship USS Lewis B. Puller (ESB-3), coastal patrol ships USS Sirocco (PC 6), USS Whirlwind (PC 11), USS Firebolt (PC 10 ), USS Tempest (PC 2), Coast Guard patrol boats USCGC Adak (WPB 1333), USCGC Maui (WPB 1304), USCGC Wrangell (WPB 1332), and guided-missile destroyer USS Paul Hamilton (DDG 60).

In addition, there were Army AH-64 Apache attack helicopters operating from USS Lewis B. Puller. What I found particularly interesting was:

On the ships involved without organic aircraft control capabilities, a Joint Terminal Attack Controller (JTAC) was embarked to communicate directly with the aircraft and provide targeting information.

Does this mean that the Island class WPBs are getting a form of data link to allow them to pass targeting information to the Army attack helicopters? Other DOD aircraft?

Will the Webber class WPCs expected to go to PATFORSWA going to get these?

“IRGCN Vessels Conduct Unsafe, Unprofessional Interaction with U.S. Naval Forces in Arabian Gulf” –US CENTCOM

NORTH ARABIAN GULF (April 15, 2020) Iranian Islamic Revolutionary Guard Corps Navy (IRGCN) vessels conducted unsafe and unprofessional actions against U.S. Military ships by crossing the ships’ bows and sterns at close range while operating in international waters of the North Arabian Gulf. U.S. forces are conducting joint interoperability operations in support of maritime security in the U.S. 5th Fleet area of operations. (U.S. Navy photo)

The following is a news release from US Fifth Fleet Public Affairs: (I bet one of those long range acoustic projectors could be really unpleasant if someone shouted over one of them at you at close range. Maybe every cutter should have them.)

On April 15, eleven Iranian Islamic Revolutionary Guard Corps Navy (IRGCN) vessels repeatedly conducted dangerous and harassing approaches of the USS Lewis B. Puller (ESB 3), USS Paul Hamilton (DDG 60), USS Firebolt (PC 10), USS Sirocco (PC 6), USCGC Wrangell (WPB 1332) and USCGC Maui (WPB 1304) while the U.S. vessels were conducting joint integration operations with U.S. Army AH-64E Apache attack helicopters in the international waters of the North Arabian Gulf.

The IRGCN vessels repeatedly crossed the bows and sterns of the U.S. vessels at extremely close range and high speeds, including multiple crossings of the Puller with a 50 yard closest point of approach (CPA) and within 10 yards of Maui’s bow.

The U.S. crews issued multiple warnings via bridge-to-bridge radio, five short blasts from the ships’ horns and long range acoustic noise maker devices, but received no response from the IRGCN.

After approximately one hour, the IRGCN vessels responded to the bridge-to-bridge radio queries, then maneuvered away from the U.S. ships and opened distance between them.

The IRGCN’s dangerous and provocative actions increased the risk of miscalculation and collision, were not in accordance with the internationally recognized Convention on the International Regulations for Preventing Collisions at Sea (COLREGS) “rules of the road” or internationally recognized maritime customs, and were not in accordance with the obligation under international law to act with due regard for the safety of other vessels in the area.

The U.S. Navy, Coast Guard, Marines and Army have been conducting joint interoperability operations in the North Arabian Gulf since late March.

U.S. naval forces continue to remain vigilant and are trained to act in a professional manner, while our commanding officers retain the inherent right to act in self-defense.

NORTH ARABIAN GULF (April 15, 2020) Iranian Islamic Revolutionary Guard Corps Navy (IRGCN) vessels conducted unsafe and unprofessional actions against U.S. Military ships by crossing the ships’ bows and sterns at close range while operating in international waters of the North Arabian Gulf. The expeditionary mobile sea base USS Lewis B. Puller (ESB 3) is conducting joint interoperability operations in support of maritime security in the U.S. 5th Fleet area of operations. (U.S. Navy photo)

“US Builds Global Coalition to Protect Gulf Shipping” –Global Security

USCG Monomoy (WPB-1326) and Adak (WPB-1333), elements of PATFORSWA

Global Security reports that the US is attempting to build a coalition to escort merchant ships through the Straits of Hormuz.

We would almost have to assume that the WPBs of PATFORSWA would be involved.

It would not be surprising to see the Coast Guard contribute up to six already commissioned Webber class WPCs in the near future. These could ultimately replace the current 110s stationed in Bahrain rather than waiting for FRCs specifically procured to replace the PATFORSWA WPBs, but for the duration of escort mission, they would augment them.

I would like to see some modifications done to these vessels before they go, but it is a question of urgency.

The Webber class could make the trip on their own bottoms if needed, especially if escorted by an National Security Cutter.

 

 

Attack on Tankers in Gulf of Oman

Image reportedly showing smoke coming from one of the tankers said to have been attacked, May 13, 2019 © AFP PHOTO / HO / IRIB

You have probably heard about the recent attack on two tankers in the Gulf of Oman. The State Department has concluded that Iran is responsible.

We are not privy to all their sources, but the US has been fooled before. Military Times discusses why responsibility may not be clear. Just the fact that the price of oil went up 4% would mean that fore knowledge of the attack could have been worth a fortune in the futures market. Any number of people could be beneficiaries. Lots of folks would like to see the US take Iran down a notch or two. Even if Iranians did it, they might not have been acting on behalf of the central government. The cargoes were destined for Taiwan, could that mean the Chinese did it?

The Middle East is never short of intrigue. It is a place made for conspiracy theories.

Eaglespeak, who does think the Iranians are behind the attack, has a good summary of the situation including information on a recent fire that destroyed or damaged several ships in an Iranian port that I had not heard about before.

I would not be surprised to see units for the Coast Guard’s PATFORSWA keeping an eye on this area.

Webber class Could be the Navy’s Light Duty Pickup Truck

Coast Guard Cutter John F. McCormick (WPC 1121) crew transits through the San Francisco Bay, Saturday, March 4, 2017, during their voyage to homeport in Ketchikan, Alaska.  Coast Guard photo by Petty Officer 2nd Class Loumania Stewart

In 2012 the US Naval Institute published an important article by then CNO Admiral Johnathan Greenert, “Payloads over platforms: Charting a new course.” It starts off, 
“We need to move from ‘luxury-car’ platforms—with their built-in capabilities—toward dependable ‘trucks’ that can handle a changing payload selection. “
He suggested that the Navy needs F150 pickups rather than Ferraris. Metaphorically the Webber class could be the Navy’s small Toyota pickup–cheap, reliable, versatile, and economical to operate. 
A strong point for the Webber class is that it is probably the smallest and cheapest combatant, being currently manufactured, that can self deploy anywhere in the world (other than the polar regions) with minimal support en route as demonstrated by their self deployment to Hawaii and Alaska and USCGC Olivier F. Berry (WPC-1124)’s successful patrol to the Marshall Islands, 2200 miles from her homeport in Honolulu.
As currently equipped there is not a lot of free space apparent on the Webber class, but removing the eight meter “over the horizon boat” would free up a large area where mission modules could be placed. We can think of it as the bed of the pickup.


180201-N-TB177-0211
U.S. 5TH FLEET AREA OF OPERATIONS (Feb. 1, 2018) Island-class patrol boats USCGC Wrangell (WPB 1332), left, USCGC Aquidneck (WPB 1309), middle, and coastal patrol ship USS Firebolt (PC 10) patrol the open seas. Wrangell, Aquidneck and Firebolt are forward deployed to the U.S. 5th Fleet area of operations in support of maritime security operations to reassure allies and partners and preserve the freedom of navigation and the free flow of commerce in the region. (U.S. Navy photo by Mass Communication Specialist 2nd Class Kevin J. Steinberg/Released)

Potential Missions
 
Countering the Swarm: 
 
The Navy’s most likely first use of a Webber class could be as replacements for the Cyclone class in South West Asia. Countering the large number of Iranian fast inshore attack craft (FIAC) is a mission the Cyclone class is expected to do now, protecting both larger Navy vessels and the tanker traffic that must pass through the Straits of Hormuz. 

The Fletcher laser guided rocket launcher fires BAE’s 2.75 inch laser guided rockets known as the Advanced Precision Kill Weapon System. (Shawn Snow/Defense News Staff)

An earlier post, “Modifying Webber Class Cutters for Duty in SW Asia,” was aimed at this threat as applied to the Coast Guard Webber class that will be going to Southwest Asia. As a minimum the Navy will likely want some form of guided weapon, Perhaps the APKWS would suffice, if provided in sufficient numbers.

Spike LR Missile launched from a Typhoon weapon station on an Israel Navy Super Dvora Mk 2. A similar configuration was recently tested by the US Navy, from an unmanned surface vessel (USV-PEM). Photo: RAFAEL

The 25mm Mk38 Mod2/3 that are currently mounted on the Webber class might be up-gunned (30, 35, and 40mm guns are all possible) and the mount might also be modified to also launch APKWS. Alternately the Mk38 might be replaced by BAE’s 40mm/70 MK4 and the Toplite gun director c(urrently mounted on the Mk38) could be mounted on the mast to control the 40mm, as the Israelis have done with some of their installations of the system, assuming the 40mm Mk 4 does not weigh too much.  

BAE Bofors 40mm/70 mk4

Optimally, the outfit should include Longbow Hellfire. It could probably be mounted as single tube launchers affixed along the sides of the superstructure. I have seen a mockup of such a launcher. The missile itself is only about seven inches in diameter. If willing to replace the boat with missiles, its likely Lockheed could produce a 12 round launcher based on half the launcher being installed on the LCS. 

ATLANTIC OCEAN—A Longbow Hellfire Missile is fired from Littoral Combat Ship USS Detroit (LCS 7) on Feb. 28 2017 as part of a structural test firing of the Surface to Surface Missile Module (SSMM). The test marked the first vertical missile launched from an LCS and the first launch of a missile from the SSMM from an LCS. (Photo by U.S. Navy)

Anti-Ship: 
In other theaters there is likely a desire to have a larger anti-ship missile. 
The Navy has been talking a great deal about “Distributed Lethality.” The concept has its origin in a January 2015 US Naval Institute article by then-Director of Surface Warfare Requirements (OPNAV N96) Rear Admiral Tom Rowden, RAdm. Peter Gumataotao, and RAdm. Peter Fanta. 
 
Rowden’s co-author and successor at N96, Rear Admiral Pete Fanta, continued the drum beat with the memorable phrase, “if it floats, it fights,” suggesting that anti-ship missiles should be put on virtually all units. 
On the Webber class, this would most likely the Naval Strike Missile (NSM), recently chosen by the Navy to arm its LCSs and frigates. A four cell launcher could probably replace the boat. The missile is only 13 feet long. 

A Kongsberg Naval Strike Missile (NSM) is launched from the U.S. Navy littoral combat ship USS Coronado (LCS-4) during missile testing operations off the coast of Southern California (USA). The missile scored a direct hit on a mobile ship target. 23 September 2014.
U.S. Navy photo by Mass Communication Specialist 2nd Class Zachary D. Bell

Missile Truck
The Army and Marines have tracked and truck mounted missile launchers. 
 
A new missile, “Deepstrike,” is being developed for these launchers. “The missile will be able to strike targets up to 309 miles away with precision, including moving targets both on land at sea.” (see also)
 
A Webber class equipped with these could function in the same way as the Army and Marine vehicles operating in the littorals and many river systems. Targeting would be provided by offboard sensors through networking. 
Anti-Submarine Warfare (ASW)
This is probably unlikely, but there might be a place for craft that could perform ASW patrols off ports and amphibious objective areas or around choke points. 
The Canadians have a small containerized towed array sensor that looks like it would fit.

TRAPS containerized active/passive towed array from GeoSpectrum Technologies.

 I have looked at how we might add torpedo tubes to the Webber class that could launch ASW torpedoes, but it is more likely aircraft, most likely helicopters, would be called in to make the actual attack. The ship would be primarily a sensor node, minimizing the requirement to keep ASW Helicopters airborne.
120mm Mortar for Naval Surface Fire Support:
Another truck like use would be to add this containerized large mortar as a way to provide naval fire support. This weapon is not currently in the US inventory but it does look promising. Guided projectiles are being developed for the 120 mm mortar.
Security for MSC’s PrePositioned Afloat Fleet

I am not sure what precautions the Navy has made to protect the ships of the MSC’s PrePositioned Afloat Fleet, but if I were an enemy there are might be strong incentive to destroy these ships that transport the most ready reinforcements of heavy equipment.

Webber class PCs might have a role in protecting these.

 Large Unmanned Surface Vessel. 

The Navy is seeking to procure a medium unmanned surface vessel (MUSV), 12 to 50 meters in length. The Webber class might be the basis for such a vessel. The modular systems described above might also be used on the MUSV. 

Visit, Search, Board, and Seizure: 

This is the mission these little ships are built for and, consequently, no change may be necessary. The mission might be stopping and boarding hundreds of small craft as was done off Vietnam as part of Operation Market Time, or it might be enforcing a blockade against Chinese shipping at the Straits providing access to the South China Sea. If resistance is expected there are a number of ways the vessels’ armament could be augmented, including missiles or torpedoes, but in most cases its likely air or backup could be called in. The real advantage is that the Navy would not need to tie down DDGs doing this work, and potentially risk it being damaged by improvised weapons on a vessel being boarded. For more challenging assignments two or three could be teamed with one or two providing boats and boarding teams and the other as a weapons carrier.

PATFORSWA Serves Forward in the Arabian Gulf–Defense Media Network


Crewmembers aboard the U.S. Coast Guard cutter USCGC Adak (WPB-1333) raise the American flag. Adak is assigned to CTF 55, supporting maritime security operations and theater security cooperation in the U.S. 5th Fleet area of responsibility. U.S. Coast Guard photo by Seaman Frank Iannazzo-Simmons

Defense Media Network has a nice piece about the activities of the Coast Guard’s Patrol Forces South West Asia (PATFORSWA).

The article makes a single quick reference to the desirability of replacing the six Island class cutters with Webber class cutters.

“Although the patrol force desperately needs the increased operational capabilities that FRCs would provide in the CENTCOM AOR, the Island class will continue to serve for the foreseeable future.”

This issue has been raised in Congress by CENTCOM. As yet no plans to build replacements, but I expect we will see this possibility raised again. 

There is more information on PATFORSWA here.

USCGC Maui in Trilateral Exercise Persian Gulf

An exercise that you might not have heard of.

USCGC  Maui (WPB-1304) exercised with USS “Vella Gulf” (CG-72), a cruiser, USS “Squall“ (PC-7) and USS “Thunderbolt“ (PC-12), both U.S. Navy Cyclone-class patrol (coastal) ships, a US Army Logistics Support Vessel, the Iraqi Navy, and the Kuwaiti Navy and Coast Guard.