Tag Archives: Strait of Hormuz

The Sentinel-class is suddenly everywhere

The Coast Guard’s very successful Fast Response Cutter (FRC) program, the 154-foot Sentinel-class patrol craft, just keeps ticking along, with lots of important milestones this month. It makes you wish the Navy could get on board with a similar shipbuilding impetus.

50th Delivered

Bollinger Shipyards in Lockport, Louisiana– builder of the 110-foot Island-class and 87-foot Maritime Protector class patrol boats for the Coast Guard going back some 35 years– on 4 August delivered their 176th hull to the service, the future USCGC William Chadwick (WPC-1150). Chadwick, as the hull number points to, is the 50th FRC delivered since the first, USCGC Bernard C. Webber (WPC-1101), was contracted in September 2008. All in all, not a bad record for just under 14 years.

USCGC Chadwick will be the first of six FRCs to be homeported in Sector Boston, which is known as “The Birthplace of the Coast Guard.” Photo via Bollinger.

Based on the Dutch Damen Stan 4708 patrol vessel, the Coast Guard expects to order 64 of the increasingly useful vessels.

At a cost of about $65 million for each hull, the entire program of record is set to come in at under $4 billion which sounds like a lot but keep in mind the Navy has sunk nine times that much, over $36 billion, into the Littoral Combat Ship program already (even with the “cost savings” of decommissioning ships only a few years old, hyping that each LCS hull costs $70 million per year to keep in the water).

Besides a 25mm MK 38 Mod 2 forward, the FRCs have at least four mounts for M2 .50 cals, a decent C4ISR suite for their size, a 28-knot flank speed, and the capability to sortie over 2,000 nm on a two-week patrol without refueling or re-provisioning. They also have a stern launch and recovery ramp for a 26-foot, over-the-horizon interceptor cutter boat.

Douglas Denman arrives in Alaska after a 7,000-mile cruise

Set to be commissioned at her new home port at Ketchikan in September, the future USCGC Douglas Denman (WPC-1149), the Coast Guard’s 49th Fast Response Cutter, traveled nearly 7,000 miles from the most southeastern city in the U.S. to the most southeastern city in Alaska, transiting through the Caribbean Sea, the Panama Canal, and up the west coast of Central America and the U.S. in a 36-day voyage.

USCGC Douglas Denman (WPC-1149) via Bollinger

After delivery from Bollinger, FRCs and their plankowner crews spend almost two months at Key West where there is no shortage of missions in the Florida Straits on which to sharpen up.

From the 17th Coast Guard district on that process:

Following production of the ship in 2020, the first crewmember arrived in Ketchikan summer of 2021. Since then, the crew has undergone a year of administration and training in preparation to take ownership of the cutter. The engineering department alone attended a total of three months of school in addition to the crew’s seven weeks of familiarity training in Lockport, La., and seven weeks of Post Delivery Availability phase in Key West, Fla.

Full FRC six-pack in the Middle East

On 23 August, USCGC John Scheuerman (WPC 1146) and USCGC Clarence Sutphin Jr. (WPC 1147), joined four other examples of the newest Sentinel-class fast response cutters as part of the Coast Guard’s long-standing Patrol Forces Southwest Asia (PATFORSWA), stationed in Bahrain where U.S. 5th Fleet is headquartered.

The two FRCs completed a 10,000-nautical-mile transit to Bahrain, escorted by 270-foot medium endurance cutter USCGC Mohawk (WMEC-913), which acted as a mothership, rather than having to be loaded as float-on cargo.

The Coast Guard has been using more of these mini surface action groups (or “Surface Asset Group” in USCG parlance), such as in the response to 2017’s Hurricane Maria in Puerto Rico and you can easily imagine such white-hulled SAGs in the event of a conflict.

Scheuerman and Sutphin were met by two other FRCs of the Coast Guard’s Persian Gulf squadron– USCGC Glen Harris (WPC 1144) and USCGC Emlen Tunnell (WPC 1145)— flying their characteristic oversized U.S. ensigns, for a great photo op through the Straits.

220822-A-KS490-1182 STRAIT OF HORMUZ (Aug. 22, 2022) From the left, U.S. Coast Guard fast response cutters USCGC Glen Harris (WPC 1144), USCGC John Scheuerman (WPC 1146), USCGC Emlen Tunnell (WPC 1145) and USCGC Clarence Sutphin Jr. (WPC 1147) transit the Strait of Hormuz, Aug. 22. The cutters are forward-deployed to U.S. 5th Fleet to help ensure maritime security and stability across the Middle East. (U.S. Army photo by Spc. Noah Martin)

Harris and Tunnell only recently arrived in Bahrain themselves, joining USCGC Robert Goldman (WPC 1142) and USCGC Charles Moulthrope (WPC 1141), to retire the six aging Reagan-era Island-class cutters that had been there since 2002 in support of Operation Iraqi Freedom.

Legacy 110 foot Island class cutters compared to the new 154-foot Sentinel (Webber) class FRCs

Besides their stabilized MK 38 25mm gun and half-dozen (up from four as seen on stateside FRCs) M2 mounts, the Sentinels in Bahrain are equipped with the CG-HALLTS system, a hailer that has laser and LRAD capabilities, as well as a special S-band Sierra Nevada Modi RPS-42 pulse doppler with full-time 360-degree coverage, and other goodies to include four dedicated Long Range Acoustic Devices (LRADs) on the O-1 deck. Additionally, the already experienced cutter and boarding crews of PATFORSWA have to go through 5-6 weeks of Pre Deployment Training (PDT) with the service’s Special Mission Training Center at Camp Lejune and undergo more training once they reach Bahrain.

Hosting RIMPAC Marines ISR team

Finally, it should be pointed out that the FRC USCGC Cutter William Hart (WPC 1134)— who has been working with embarked teams of Hawaii-based Marines for intelligence, surveillance, and reconnaissance tests in the littoral since 2021– apparently did more of the same in the recently-concluded RIMPAC exercises.

Hart has been very active in presence missions in Oceania, recently completing a 10-day voyage to Samoa last winter in Operation Kurukuru and then operating alongside ships from the U.S., Australia, New Zealand, and France to combat illegal, unreported, and unregulated fishing (often from Chinese trawlers) in the region while on a 39-day patrol— which is a long time to spend on a 154-foot ship.

Still, they are getting it done and on the cheap at that.

Limpet mine update: ‘With high confidence’

U.S. Navy CDR Sean Kido, head of Explosive Ordnance Disposal Mobile Unit One One (EODMU 11) explains the attack on the Panama-flagged chemical/oil tanker Kokuka Courageous (19,349t) and the Norwegian-owned (International Tanker Management) Marshal Islands-flagged oil tanker Front Altair, allegedly by Iran’s Revolutionary Guard, in the Gulf of Oman on June 13th, 2019:

Mr. Limpet makes his daytime appearance in the Gulf of Oman

Not this guy who everybody loved:

This guy:

(Or approximate)

The attack in International waters hit the Panama-flagged chemical/oil tanker Kokuka Courageous (19,349t), owned by Singapore-based Bernhard Schulte Shipmanagement (BSM) and carrying a load of methanol; along with the Norwegian-owned (International Tanker Management) Marshal Islands-flagged oil tanker Front Altair (62,849t) with a load of crude, early on June 13. Both were carrying what Japan’s Trade Ministry says were “Japan-related” cargo.

The attacks occurred off the Emirati port of Fujairah, also on the Gulf of Oman, approaching the Strait of Hormuz, the narrow mouth of the Persian Gulf through which a third of all oil traded by sea passes.

Kokuka Courageous Front Altair

“The timing was considered sensitive as Japanese Prime Minister Shinzo Abe was visiting Iran on a high-stakes diplomacy mission.”

5th Fleet’s release on the matter through CENTCOM:

TAMPA (NNS) — U.S. Naval Forces in the region received two separate distress calls at 6:12 a.m. local time from the motor tanker (M/T) Altair and a second one at 7a.m. local time from the M/T Kokuka Courageous.

Both vessels were in international waters in the Gulf of Oman approximately 10 nautical miles apart at the time of the distress calls. USS Bainbridge was approximately 40 nautical miles away from the M/T Altair at the time of the attack and immediately began closing the distance.

At 8:09 a.m. local time a U.S. aircraft observed an IRGC Hendijan class patrol boat and multiple IRGC fast attack craft/fast inshore attack craft (FAC/FIAC) in the vicinity of the M/T Altair.

At 9:12 a.m. local time a U.S. aircraft observes the FAC/FIAC pull a raft from the M/T Altair from the water.

At 9:26 a.m. local time the Iranians requested that the motor vessel Hyundai Dubai, which had rescued the sailors from the M/T Altair, to turn the crew over to the Iranian FIACs. The motor vessel Hyundai Dubai complied with the request and transferred the crew of the M/T Altair to the Iranian FIACs.

At 11:05 a.m. local time USS Bainbridge approaches the Dutch tug Coastal Ace, which had rescued the crew of twenty-one sailors from the M/T Kokuka Courageous who had abandoned their ship after discovering a probable unexploded limpet mine on their hull following an initial explosion.

190613-N-N0101-115 GULF OF OMAN (June 13, 2019) In this Powerpoint slide provided by U.S. Central Command damage from an explosion, left, and a likely limpet mine can be seen on the hull of the civilian vessel M/V Kokuka Courageous in the Gulf of Oman, June 13, 2019, as the guided-missile destroyer USS Bainbridge (DDG 96), not pictured, approaches the damaged ship. (U.S. Navy photo/Released)

190613-N-N0101-116 GULF OF OMAN (June 13, 2019) In this Powerpoint slide provided by U.S. Central Command damage from an explosion, left, and a likely limpet mine can be seen on the hull of the civilian vessel M/V Kokuka Courageous in the Gulf of Oman, June 13, 2019, as the guided-missile destroyer USS Bainbridge (DDG 96), not pictured, approaches the damaged ship. (U.S. Navy photo/Released)

While the Hendijan patrol boat appeared to attempt to get to the tug Coastal Ace before USS Bainbridge, the mariners were rescued by USS Bainbridge at the request of the master of the M/T Kokuka Courageous. The rescued sailors are currently aboard USS Bainbridge.

190613-N-SS350-0135 GULF OF OMAN (June 13, 2019) Sailors aboard the Arleigh Burke-class guided-missile destroyer USS Bainbridge (DDG 96) render aid to the crew of the M/V Kokuka Courageous. (U.S. Navy photo by Mass Communication Specialist 3rd Class Jason Waite/Released)

At 4:10 p.m. local time an IRGC Gashti Class patrol boat approached the M/T Kokuka Courageous and was observed and recorded removing the unexploded limpet mine from the M/T Kokuka Courageous.

The U.S. and our partners in the region will take all necessary measures to defend ourselves and our interests. Today’s attacks are a clear threat to international freedom of navigation and freedom of commerce.

The U.S. and the international community, stand ready to defend our interests, including the freedom of navigation.

The United States has no interest in engaging in a new conflict in the Middle East. However, we will defend our interests.

The attack comes a month to the day after what is described as “Coordinated teams of divers using limpet mines incapacitated the vessels in a series of timed detonations” to damage four tankers from the Emirates, Saudi Arabia and Norway off the Emirati coast.

The underwater damage to the Saudi Arabian tanker Al Marzoqah May 12

Saudi Arabian tanker Amjad was one of those attacked in the Port of Fujairah May 12

And the beat goes on…

Google Operation Praying Mantis to see how this is going to end up.

Coming at your from 1988: