Navy Chooses Longbow Hellfire

Posted on October 5, 2015 by Chuck Hill

Lockheed Martin animation of Hellfire employment from an LCS

The US Naval Institute Proceedings is reporting that Navy has committed to selection of the Longbow Hellfire as an interim missile to arm the Littoral Combat Ships.

“For the LCS deployment, a single Longbow Hellfire launcher with a 24-missile capacity will be integrated with the LCS SSMM, which will be part of one of three weapon stations. Navy officials point out that Longbow Hellfire integration for the LCS SSMM will require only software modifications; no changes to the missile hardware or to the Army launcher or gas-containment system will be needed.

“In selecting the Longbow Hellfire, the Navy also will be able to draw from an available inventory of thousands of missiles already stockpiled for the Army, avoiding the need to spend money on new production.

“Navy officials emphasize that the Longbow Hellfire meets the requirement of the LCS Capabilities Description Document for a standoff-engagement capability for fast inshore attack craft. An “increment 3” of the SSMM, while still going through modifications, now is expected to be ready to deploy aboard LCSs with the Longbow Hellfire in 2017.”

As we have discussed before, this weapon system seems like a good one for arming cutters against the possibility of an attack by highly maneuverable, high speed craft. In quantity the missiles might also be effective against larger targets.

It is likely the Coast Guard could add this capability at relatively low cost, if they made a case for it. As noted there are already large stocks of the missile. It seems likely that these weapons will be replaced on the LCSs before all the Offshore Patrol Cutters are complete. There are likely to be large numbers of Hellfire considered semi-obsolescent as they are replaced by the JAGM.

Weapons Interdicted in the Arabian Sea

Posted on October 4, 2015 by Chuck Hill

This is one of several reports I have seen of the interdiction a dhow carrying weapons believed to have been en route from Iran to Yemen.

There are a number of unanswered questions about this operation. We don’t know who did the initial intercept and boarding. We don’t really know where the vessel was going.

What we do know is that the cargo included a number of anti-tank weapons, most of which were dumped at sea. A USN destroyer, USS Forrest Sherman, arrived on scene after the initial intercept to assist in the investigation. The dhow and its crew were released after the arms were confiscated.

I strongly suspect Coast Guard personnel may have been involved in this operation, if not directly, at least to the extent that they were involved in the training of those that were directly involved. Hopefully we will learn more in the future.

Shipping LNG in the Arctic

Posted on October 3, 2015 by Chuck Hill

We have some indication, we will soon see LNG being shipped in the Arctic. gCaptain reports an apparent intention of a Chinese/Greek consortium to build five ice capable LNG tankers for the transport of Russian LNG via the Arctic.

If these ships actually use an Arctic route to China, it will almost certainly be via the Northern Sea Route close to Russia rather than the North West Passage near Canada and the US, but both routes must exit very close to Alaska as the traffic moves through the 45 mile wide Bering Strait and past the Diomedes and St. Lawrence Island.

There is no indication of how large these proposed LNG tankers are, but take a look at the size of the tanks on this LNG tanker in this photo, one of several you can find at this gCaptain post.

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Yes, those are people casting the shadows.

Innovation in Propellers

Posted on October 2, 2015 by Chuck Hill

Tip vortices – conventional versus Kappel. Tip vortices are tubes of circulating water that are formed at the tip as the propeller generates thrust.

Tip vortices – conventional versus Kappel. Tip vortices are tubes of circulating
water that are formed at the tip as the propeller generates thrust.

gCapatain has photos of a new type of propeller.

Although I have a hard time seeing it in the photos, this shape is similar in concept to the upturned wing tips that now common on commercial aircraft. Propellers are after all, really just wings that rotate around a central hub. Having seen this, I now wonder why we haven’t seen this before.

Diagrams of fluid flow over a airfloil section usually show a linear flow from the leading edge to the trailing edge, but actually there is also a span-wise flow that spills off the tips and creates vortices. They add drag and increase noise.

Photo: The air flow from the wing of this crop duster is made visible by a technique that uses colored smoke rising from the ground

Of course the reason the airlines use these devices is to improve fuel economy. The principle also works for propellers.

New SeaPay

Posted on October 1, 2015 by Chuck Hill

The Coast Guard has begun a new SeaPay system as reported by Coast Guard All Hands.

The new five-table system takes into consideration desirability of different cutter platforms, personnel tempo, deployment lengths and programmed operational hours.

“We made a conscious decision to shift most of the sea pay increases to mid-level enlisted paygrades in an effort to incentivize them to return to sea duty assignments,” said Master Chief Petty Officer of the Coast Guard Steven Cantrell. “A three-level system just wasn’t enough, and it didn’t allow flexibility to change with the times. These changes don’t take place in a vacuum – a lot of decision and a lot of discussion went into these just to get it right.”

This system is relatively complex, but it appears a realistic effort to achieve the stated goals.

Can’t help believe this only happened because we have a “Cutterman” as Commandant who understands that all sea duty is not equal.

The linked post includes the five pay charts.

Closer Coast Guard Ties with Vietnam

Posted on September 30, 2015 by Chuck Hill

The Vietnamese have not had a coast guard very long, just two years, but it looks like after a recent visit by our Commandant, the US Coast Guard will be working more closely with them. The US had already committed to financing the purchase of US made patrol boats for the Vietnamese Coast Guard to the tune of $18M. We discussed this earlier here and here.

As you probably know, the Vietnamese and Chinese have an ongoing dispute over a large area of the South China Sea. A recent change has authorized the their Coast Guard to use force as necessary to expel those who violate law from Vietnamese waters.

Poland looking for OPCs

Posted on September 29, 2015 by Chuck Hill

Rolls Royce proposal

Poland is planning some ships that have many similarities to the Offshore Patrol Cutters. We have talked about these a little already, in the context of an unconventional hull form offered by ThyssenKrupp Marine Systems (TKMS) that promises better fuel economy. Our friend at Thinkdefence talks about another proposal from Rolls Royce. He also provided a link to a more detailed description of the program.

The intention is apparently to produce three “Miecznik” corvettes and three “Czapla” patrol ships (with mine countermeasures) with the two classes sharing a common platform. ThinkDefence reports the key features of Rolls Royce’s corvette version as follows:

“It is 99.7 metres long and displaces just over 2,400 tonnes. Accommodation for 60 crew and an additional 30 personnel is included and the ship is said to have a 28 day endurance. With a CODLOD propulsion system its design top speed is 25 knots. Weapons and sensors include a 76mm Oto Melara gun, twin MSI 30mm automatic cannons, two quad NSM missile launchers, MU90 torpedo launchers and four Sylver A35 cells for quad packed VL-MICA anti-aircraft missiles; Smart-S 3D radar, Thales optronic systems and Kingclip sonar.”

Substituting some equivalent US systems, I think that would represent a good approximation of how a war ready OPC might be equipped.

Apparently they intend to order one ship a year beginning with the corvettes in 2017. That starts them on nearly the same schedule as the OPCs. Which will be finished first? Unfortunately the Poles will probably see their first ship before we see the first OPC.

Rolls Royce CDV 4

Icebreaking Mega-Yacht

Posted on September 25, 2015 by Chuck Hill

gCaptain reports a proposal from Damen and Dutch luxury superyacht builder AMELS, offering a line of icebreaking Mega-Yachts sized 65, 90, and 100 meters in length. The design incorporates a double-acting hull, capable of breaking ice stern-first and an “Axe Bow” for good seakeeping in ice-free seas.

The basic hull form might make a decent Arctic Patrol Cutter.

Gaps in Coast Guard History

Posted on September 25, 2015 by Chuck Hill

The US Naval Institute’s News Service has provided access to a Coast Guard report to Congress mandated in the Howard Coble Coast Guard and Maritime Transportation Act of 2014 (Pub. L. No. 113-281).

Not later than 1 year after the date of enactment of this Act, the Commandant of the Coast Guard shall submit to the Committee on Commerce, Science, and Transportation of the Senate and the Committee on Transportation and Infrastructure of the House of Representatives a report on any gaps that exist in writings on the history of the Coast Guard. The report shall address, at a minimum, operations , broad topics, and biographies with respect to the Coast Guard.”

The document is relatively short. There is a fairly long list of topics, but I’m not sure how useful it is. I am sure Bill Wells will have something to say about this.

It seems lately we have seen more from the Atlantic Area Historian than from the Coast Guard Historian.

It also seems the Coast Guard has not “weaponized” its history. The Coast Guard is not using it to enhance the image of the service.

Hybrid Electric Drive (HED)

Posted on September 24, 2015 by Chuck Hill

US Navy photo, USS Halsey (DDG 97)

The US Naval Institute reports that the Navy intends to put auxiliary electric motors, or hybrid electric drive (HED) system, on 34 Burke Flight IIA guided missile destroyers (DDGs), by adding an electric motors to a preexisting quill drives in the main reduction gear. Reportedly these will power the vessels at up to 13 knots.

These systems will not only save money when the ships are cruising slowly, they will also allow them to remain on station longer.

Although the typical diesel power plant on cutters is more efficient at low speeds than the DDG’s gas turbines, a HED should also be applicable to Coast Guard cutters. We do seem to spend a lot of time cruising slowly. It would also provide a redundant propulsion system as a backup if the main engines were disabled. I am hoping there will be something similar on the Offshore Patrol Cutter.