Category Archives: Offshore Patrol Vessel

“New Drone Surveillance System to be Deployed on Canadian Coast Guard Vessels in Trials Funded by DRDC” –Kongsberg Geospatial

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Image credit: Kongsberg Geospatial

Below is a news release from .Kongsberg Geospatial. It talks about a demonstration of their sensor data management system, called MIDAS, to be conducted with the Canadian Coast Guard, in conjunction with the Martin UAV V-BAT fixed-wing vertical take-off and landing (VTOL) Unmanned Aerial System (UAS).

What really got my attention is that their illustration, above, appears to indicate that they expect to operate the V-BAT from Hero Class Cutters. These cutters are closely related to the USCG Webber class, but are smaller, 14 feet shorter and over three feet narrower. If they do succeed in operating it off the Hero Class, then we should also be able to operate it off the Webber class cutters.

We have talked about V-BAT before, and in fact, it was operated for a short evaluation from USCGC Harriet Lane. You can read about V-BAT here and here.

Sounds like a very interesting demonstration. Perhaps CG R&D could send an observer.

New Drone Surveillance System to be Deployed on Canadian Coast Guard Vessels in Trials Funded by DRDC

Written by Kongsberg Geospatial on . Posted in News

Ottawa, CA: Kongsberg Geospatial announced today that it has been selected by Defence Research and Development Canada (DRDC) to conduct trials of a new long-endurance UAV surveillance system for the Canadian Coast Guard. The Martin UAV V-BAT aircraft was selected to provide the unique ability to combine take off and landing from the small confines aboard ship with the long endurance of a fixed-wing aircraft while carrying multiple sensors.

Combining a unique Vertical Take-off aircraft and new sensor data PED solution allows for rapid collection and analysis of sensor data

The aircraft will communicate with the Kongsberg Geospatial sensor data management system, called MIDAS, which allows a range of sensor data, including full-motion video from unmanned systems to be processed and exploited in near real-time by analysts on board Canadian Coast Guard ships. MIDAS provides the capability to compare historical and live data from the mission area, and to examine sensor data with a variety of tools, including motion and object detection, in near-real time. This near real-time analytical capability can greatly enhance the effectiveness of UAVs for a variety of mission types.

The V-BAT Unmanned Aerial System (UAS) provided by Martin UAV is a fixed-wing vertical take-off and landing (VTOL) aircraft specifically designed to operate from very small spaces on ships, land, and nearly any environment. The V-BAT is a long-endurance aircraft capable of carrying multiple sensors, including land and maritime wide area surveillance.

Kongsberg Geospatial’s MIDAS is derived from technologies created for the NATO Alliance Ground Surveillance project which required the storage and retrieval of vast amounts of intelligence data for Intelligence Analysts. The system directly addresses the problem that the vast majority of UAVs have no standards-compliant capability to process, exploit, and distribute (PED) their sensor data where it is being used. MIDAS provides a fully standards-compliant system that allows intelligence analysts to view, process, and analyze sensor data in near real-time, from where the drone is being operated. MIDAS has packaged these capabilities into a tactical and portable form factor to enables those surveillance capabilities to be deployed as a portable system on board a ship, or in a temporary command post.

CINTIQS Military Technology Consulting will be providing consulting services for the planning and conduct of the flight trials and sensor employment to validate systems performance.

The combination of the Martin UAV V-BAT and the Kongsberg MIDAS sensor data management system will allow Coast Guard vessels to significantly expand their surveillance range for search and rescue missions, and for the surveillance of the movement of icebergs, without requiring the use of manned aircraft.

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“UAVs are a useful tool, but they only truly effective if they can collect sensor data that results in actionable intelligence”, said Ranald McGillis, President of Kongsberg Geospatial. “Our MIDAS system allows users to fully exploit raw sensor data, and derive useful intelligence at the tactical edge where the UAV is being used. In a search and rescue context, that could mean using infrared sensors, or near real-time motion detection to locate a subject when visibility or weather conditions are poor.”

About Kongsberg Geospatial: Based in Ottawa, Canada, Kongsberg Geospatial creates precision real-time software for mapping, geospatial visualization, and situational awareness. The Company’s products are primarily deployed in solutions for air-traffic control, Command and Control, and air defense. Over nearly three decades of providing dependable performance under extreme conditions, Kongsberg Geospatial has become the leading geospatial technology provider for mission-critical applications where lives are on the line. Kongsberg Geospatial is a subsidiary of Kongsberg Defence & Aerospace.

Media contact: 1-800-267-2626 or reach us by email at info@kongsberggeospatial.com

About Martin UAV: Based in Plano, TX, the mission of Martin UAV is to build the world’s most advanced unmanned systems. Our technology team specializes in building tactical systems from the ground up, addressing the vast capability gaps left by legacy technologies and current government programs of record around the world. With decades of research and development, our platforms offer cutting edge applications and engineering feats unmatched in the government or commercial sectors of today.

About CINTIQS: Based in Ottawa, Canada, CINTIQS is a veteran-owned and operated MilTech (Military Technology) business focused on helping Canadian technology companies solve the problems that matter most to those in uniform. CINTIQS represents the highest concentration of tactical, operational, and strategic-level military intelligence expertise in Canada. In combination with their technical and industry/business depth, the company provides the expertise you need to succeed in the ultra-competitive global defence market.

About the Canadian Coast Guard: Headquartered in Ottawa, the Canadian Coast Guard is the coast guard of Canada. Founded in 1962, the coast guard is tasked with marine search and rescue, communication, navigation and transportation issues in Canadian waters, such as navigation aids and icebreaking, marine pollution response and providing support for other Canadian government initiatives. The coast guard operates 119 vessels of varying sizes and 22 helicopters, along with a variety of smaller craft.

About DRDC: Based in Ottawa, Canada, Defence Research and Development Canada is the Department of National Defence’s and Canadian Armed Forces’ science and technology organization. DRDC develops and delivers new technical solutions and advice for not only DND/CAF, but also other federal departments, and the safety and security communities.

Norway’s Coast Guard Jan Mayen-class vessel

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Norway’s Coast Guard Jan Mayen-class vessel (Picture source: Vard)

We have some new information on Norway’s three new very large ice capable Arctic patrol ships. Naval News reports they will be equipped with inertial navigation systems and we have the artist’s concept above I had not seen previously.

“We’re very proud to be supporting the Norwegian Coast Guard in securing Norway’s exclusive economic zone (EEZ), internal and territorial waters.”, states Regis Blomme, Sales Director at iXblue. “The arctic zone, in which the new vessels will operate, is a very challenging environment and our Fiber-Optic Gyroscope (FOG) based INS and Netans NDDCS have already proven to offer highly accurate, resilient, and secure navigation in such Northern latitudes. We particularly want to thank Vard for their strong vote of confidence in our technology and look forward to our collaboration with them.”

As we noted earlier,

“Deliveries of the three vessels are scheduled from Vard Langsten in Norway in 1Q 2022, 1Q 2023 and 1Q 2024 respectively. The hulls will be built at Vard’s Tulcea, Romania, shipyard…”

Specifications are:

  • Displacement: 9,800 tons
  • Length: 136.4 meters (447.4 ft) loa
  • Beam: 22 meters (72.16 ft)
  • Draft: 6.2 meter (20.3 ft)
  • Speed: 22 knots.

Note–VARD is also the designer for the Offshore Patrol Cutters.

Looking at the China Coast Guard, What Has Xi Wrought?

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Photo: William Colclough / U.S. Coast Guard

The photo above, which looks so much like a National Security Cutter, headed a Marine Link report “China Authorizes Coast Guard to Fire on Foreign Vessels if Needed.” It prompted me to look again at the Wikipedia entry for “Equipment of the China Coast Guard.”

According to Wikipedia, the China Coast Guard has very few aircraft, “a handful of Harbin Z-9 helicopters (their version of the Eurocopter AS365 which is very similar to the H-65–Chuck), and a maritime patrol aircraft based on the Harbin Y-12 transport.”

Their total number of personnel is only about a third that of the USCG.

But when you look at their fleet of large cutters, it is a very different story.

This Chinese coast guard ship is equipped with weapons believed to be 76-millimeter guns. © Kyodo

The China Coast Guard (CCG) has about three times the number of large cutters (1,000 tons or larger) as the USCG. They have well over 100, including at least 60 larger than the 270s. This, in spite of the fact that their EEZ, even including their “Nine Dash Lines” claims disputed by Taiwan and other nations is less than a fifth that of the US. Their internationally recognized EEZ is less than 8% of that of the US.

Virtually all these cutters were acquired in the last 15 years. While most CCG cutters are lightly armed, that is changing rapidly, with 76mm guns and 30mm Gatling guns becoming increasingly common. Many of the new cutters are built on the same hulls as PLAN frigates and corvettes.

“As of July 1, 2018, the China Coast Guard was transferred from civilian control of the State Council and the State Oceanic Administration, to the People’s Armed Police, ultimately placing it under the command of the Central Military Commission”

The CCG does not do buoy tending or icebreaking. Primary responsibility for SAR and maritime regulatory activities are invested in other agencies. There is a 25,000 member China Maritime Safety Administration, which has a few large cutters of its own, and a 10,000 member China Rescue and Salvage Bureau with its own cutters.

I think it is fair to say the China Coast Guard is much more focused on its para-military role than the US Coast Guard. Should China attempt to invade Taiwan, I feel sure the China Coast Guard will be transporting troops and providing naval gunfire support. They might even undertake small scale surprise landings own their own, perhaps in multiple locations simultaneously.

“Pakistan Navy commissioned its new PNS Tabuk Damen corvette OPV 1900” –Navy Recognition

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PNS Tabuk during sea trials. (Picture source Damen)

NavyRecognition reports the commission of the second of two Damen designed offshore patrol vessels (OPV) built in Romania for the Pakistani Navy.

The Damen OPV 1900 has a hull-length of 90 m, a maximum speed of 22 knots, and a full-load displacement of 1,900 tons. The ship can launch two high-speed RHIBs of 11.5 meters and 6.5 meters simultaneously and also has the capability to accommodate two TEUs for special mission-based operations. The rear deck of the ship is able to transport both a helicopter and a UAV.

According to Janes, the ships are 2,300 tons (presumably full load), 91.3 meters (299.5′) in length, with a beam of 14.4 m (47.2′), a draft of 4 m (13.1′), and a complement of 138.

Below is a video shot on the first ship of the class. You can see that it also includes a hangar. Weapons and additional sensors are to be fitted in Pakistan. The video indicates the ship will be equipped with two 30mm cannon and anti-ship cruise missiles. The model, seen in the video at time 1m30s, shows the vessel equipped with what appears to be a single barrel mount similar to the Mk38 forward, but the mount on the aft starboard corner of the superstructure, looks like a Chinese Type 730 CIWS that includes a seven barrel Gatling gun. That weapon is currently in service with the Pakistani Navy. You would think the same weapon would be used in both positions, but the more sophisticated CIWS might not take kindly to the green water that is likely to come over the bow. The model also shows launchers for eight anti-ship cruise missiles, presumably of Chinese origin, like the C-802. The ships are also reportedly being given an ASW capability. 

Bulgaria Selects Lürssen to Provide OPV with ASW and ASuW Capability

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Lürssen 90 meter OPV

NavyRecognition reports that Bulgaria has approved the purchase of two Offshore Patrol Vessels (OPV) from the German firm Lürssen. This is the same company that designed OPVs for Australia and Brunei, but these will be different from the earlier ships.

“…the Bulgarian Navy has a requirement for two modular, multi-role patrol vessels, which would be capable of performing various types of tasks, such as anti-submarine and anti-surface warfare.”

“According to local media, the Bulgarian Ministry of Defense (MoD) has requested a ship that will be armed with one 76mm naval gun, anti-ship and surface-to-air missiles, lightweight torpedos and close-in weapon systems for self-defence. The ship will also have a flight deck to accommodate a medium-sized helicopter.”

Lürssen’s descriptions of their OPV offerings make no mention of an ASW capability, but they do have space for containerized systems that might include some type of towed array sonar. Because of the capabilities required, along with the larger crew required to support them, I would assume that the chosen design is based on the larger 85 or 90 meter offerings. According to the company web site the 90 meter OPV is typically equipped with:

  • 1 X 76/62 COMPACT OR 1 X BOFORS 57 MK3
  • 4 X MM40 EXOCET OR 4 X RBS 15 MK3 OR 4 X NSM
  • 1 VLS MK56 OR RIM-116 RAM
  • 2 X DECOY (E.G. MASS OR SWKS)
  • 2 X 20MM REMOTE CONTROLLED
  • 2 X .50 M2HB MACHINE GUNS
  • 1 X 3D SEARCH RADAR
  • 1 X FIRE CONTROL RADAR
  • 2 X NAV RADAR
  • EO/IR SENSORS
  • 1X HELICOPTER
  • GUIDANCE RADAR
  • ESM / ESM
  • IFF
  • LINK 11/16
  • HELICOPTER HANGAR
  • HELICOPTER LANDING DECK (11T)
  • 2 X 9 M RIB
  • 2 X 5,5 M RIB
  • STERN RAMP
  • 2 CONTAINER SPACES

(Bulgaria does already have Exocet and Sea Sparrow missiles in their inventory.)

Physical Characteristics are:

  • DISPLACEMENT: 2,100 T
  • LENGTH: 90 M (295 ‘)
  • BEAM: 14 M (46′)
  • DRAUGHT: 3.5 M (11.5′)
  • CREW: 86 (+4 EMBARKED)
  • TWO DIESEL ENGINES
  • 6,300 KW  (8448 HP) (That should result in 21-22 knots–Chuck)

Bulgaria’s Navy is small but growing. They still have a lot of Soviet/Eastern Block equipment. Bulgaria’s coast is on the Black Sea. Other nations bordering the Black sea are Georgia, Romania, Russia, Turkey, and Ukraine. Of these Russia has the strongest naval presence.

No indication yet where the ships will actually be built.

A map showing the location of the Black Sea and some of the large or prominent ports around it. The Sea of Azov and Sea of Marmara are also labelled. Created by User:NormanEinstein, Wikipedia

“10,000 Tons Patrol Vessel ‘Haixun’ Launched For China’s Maritime Safety Administration” –Naval News

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Artist impression of 10,000 tons class patrol vessel Haixun

Naval News reports the launch of a 10.700 ton cutter (more than twice the size of a National Security Cutter) for the Chinese Maritime Safety Agency. We knew this was coming.

“The 165-meter maritime security patrol vessel has a displacement of 10,700 tonnes and a speed of over 25 knots (46 km / h). It can travel more than 10,000 nautical miles (18,520 kilometers) at an economical speed of 16 knots (30 km / h) and make trips of more than 90 days.”

This is not the China Coast Guard (CCG). That is a separate agency and they already have built ships that may be larger than this.

Like the China Coast Guard ships, these may have a wartime role as fast attack transports. Unlike the CCG ships, these do not appear to have significant armament.

Speed of construction is significant. “Construction of the vessel began in May 2019…and is set to enter service next year.”

France Allocates One Billion Euros to Build Ten Offshore Patrol Vessels

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Marine Nationale photo, FS Lieutenant_de_vaisseau_Lavallée, one of seven 80 meter (263′) 1,270 ton D’Estienne d’Orves-class avisos or corvettes being used as Offshore Patrol Vessels that are to be replaced.

France has been building a lot of Coast Guard Cutter like vessels recently and it looks like they will be building more. Naval News reports:

Ten new generation OPVs will replace the A69 type (D’Estienne d’Orves-class) PHM (formerly Aviso / light frigates and then reclassified as patrol vessels) based in Brest (Atlantic Coast–Chuck) and Toulon (Mediterranean- Chuck) and the PSP patrol boats based in Cherbourg (English Channel-Chuck).

Cormoran (P677), one of three 23 knot, 54 meter (177′), 477 ton French navy PSP patrol boats. Brest, Finistère, Bretagne, France. Photo by Gary Houston (Notice the striping similar to that carried by USCG cutters)

The one billion Euro contract awarded to Naval Group (formerly DCNS) would mean a unit cost of approximately 100M Euros ($112M).

Rendering of the future “POM” OPV of the French Navy.

Apparently, based on price, they will be larger than the six recently contracted 70 meter, 22knot “POM” patrol vessels. (224 million euros, 37.3 Euros or about $42M each)

Not long ago Naval Group and ECA group was given a 2B Euro contract to produce twelve 2800 ton Mine Countermeasures ships for the Dutch and Belgium Navies. Given that ship yard prices for similarly complex ships tend to be proportional to their displacement, and that these ships are probably less complex than the MCM, I would suspect that the new OPVs will be about 1,680 tons. That would make them similar in size to the WMEC 270s. Given the ships they are replacing and the character of recent construction, they will probably a bit longer and faster than the 270s, probably about 90 meters long, at least 20 knots but probably more, with a flight deck for a medium helicopter like the NH90, a hangar for a smaller helicopter similar to the H-65 and probably the 700 kilo rotary wing unmanned aircraft planned for POM. There will probably be space for containers. The crew will be small by Coast Guard standards, maybe less than 50, but will likely have additional accommodations for about 30 in addition to the crew.

Weapons: It will almost certainly have the Nexter Narwhal 20 mm cannon and .50 caliber machine guns, but there is no indication if they will have anything larger. French Navy vessels that wear the “Coast Guard Stripe” apparently have no weapons larger than .50 cal. (12.7mm). The seven A69 corvettes to be replaced have 100mm guns, but these ships were not originally designed as law enforcement vessels, and once also had Exocet anti-ship cruise missiles, so a medium caliber gun may not be seen as a requirement. If they wanted to put a medium caliber gun on these at small cost, the French Navy almost certainly has numerous, surplus, still very effective 100mm guns, but their newer ships mount the Super Rapid 76mm, which weighs less than half as much. The quoted French Ministry of Armed Forces statement might suggest they see a need for stronger armament.

“In a context marked by the increase in maritime traffic and the toughening of threats at sea, patrol boats fulfill a very broad spectrum of missions: support for deterrence, presence in areas of sovereignty and interest, evacuation, protection, escort and intervention in the framework of State action at sea.”

The linked Naval News post mentions the European Patrol Corvette program as a possible basis for this program, but given their projected displacement of 3000 tons, they would be beyond the projected budget.

There is a good chance these ships will emerge as an upgraded version of the the 87 meter (285′), 1450 ton L’Adroit (above) which was sold to Argentina along with three similar ships. The Naval News post indicates that the projected cost of the new OPVs is almost twice the cost so of the L’Adroit class, but they were designed for export. Meeting Navy standards with better equipment and improved survivability can substantially increase cost. When the Royal Navy built their River Batch II OPVs it was based on OPVs originally ordered by Trinidad and Tobago. Modifying the design to meet Royal Navy standards caused a great increase in price. The three vessels were built for Trinidad and Tobago cost £150M pound (US$237.8 M). When the Royal Navy contracted for three ships that met their standards, the outwardly almost identical ships came in at a fixed price of £348 million–a few years later, but more than double the price.

Three Missile Armed Cutter X for Senegal, 20 Patrol Boats for Ukraine

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OPV 58 S from PIRIOU

Two posts from Naval News. French shipbuilders are doing well in the patrol vessel market.

First, “The Ministry of Armed Forces of Senegal and French shipbuilder PIRIOU signed November 17 a procurement contract for three OPV 58 S for the Navy of Senegal. The vessels will be fitted with missile systems, a first for this African navy.”

Second, “The Government of Ukraine gave its green light for the procurement of 20 FPB 98 patrol vessels made by French shipyard OCEA.”

The Senegalese OPVs:

The ships for Senegal fall into that class significantly larger than the Webber class, but significantly smaller than the OPCs. They will be even a little smaller than the 210s. It would be at the lower end of a type, I have called cutter X, vessels with a crew and equipment similar to that of a Webber class FRC, but with better sea keeping and longer endurance. Specifications are:

  • Length: 62.20 meters (204′)
  • Width: 9.50 meters (31.2′)
  • Draft: 2.90 meters (9.5′)
  • Speed: 21 knots
  • Range / Endurance: 25 days, 4,500 nautical miles @ 12 knots
  • Hull / Structure: Steel / Aluminum
  • Accommodations: 48 (24 crew + 24 mission personnel)
  • Stern ramp for two RHIBs

For an Offshore Patrol Vessel, it is very well armed with:

  • A 76mm main gun on the Foc’sle
  • 4x Marte MK2/N anti-ship missiles forward, between the gun and the bridge
  • 2x 12.7mm manned manchine guns on the bridge wings
  • 2x 20mm remote weapon stations (Narwhal by Nexter) at the back of the bridge
  • A SIMBAD-RC surface to air system

The Marte MK2/N missile weighs 310 kg (682#) and is 3.85 metres (12.6′) long. The warhead weighs 70 kilogram (154 pound). The missile, has “an effective range in excess of 30 km, is a fire and forget, all weather sea skimming missile with inertial mid-course navigation through way points and active radar terminal homing. These missiles give these boats a range almost double that of the 57mm or 76mm guns.

SIMRAD-RC is a remote weapons station for launch of two Mistral missiles. Developed as a shoulder launched, Man Portable Air Defense (MANPAD) system, Mistral is a short ranged (6km) IR homing missile. It is claimed to be capable against a range of air targets as well as small surface targets.

Ukrainean OCEA FPB 98 patrol boat:

OCEA FPB 98 patrol boat (Credit: OCEA)

This is a deal, we discussed in July, when it appeared likely. I will repeat the description here.

They have a GRP hull and are powered by two 3,660 HP Caterpillar diesels using waterjets. Specs for vessels of this type sold to Algeria.

  • Displacement: 100 tons
  • Length: 31.8 meters (104’4″)
  • Beam: 6.3 meters (20’8″)
  • Draft: 1.2 meters (3’11”)
  • Speed: 30 knots
  • Range: 900 nmi @ 14 knots
  • Crew: 13

They will probably be equipped with a 20 to 30mm gun.

 

“OCEA Launched Largest Aluminum OPV in the World for Philippine Coast Guard” –Naval News

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OPV270. OCEA photo

Naval News reports that the French shipyard OCEA has launched the largest aluminum offshore patrol vessel ever constructed. It is going to the Philippine Coast Guard as part of a package deal that also included four much smaller patrol boats. The shipyard claims substantial lifecycle saving in fuel and maintenance as well as lower emissions due to the choice of building materials. (Note the underwater body on the after third of the ship. It looks unusual.)

Choice of an aluminum hull and superstructure does bring on discussion of the possible dangers of using aluminum, frequently blamed for serious damage due to fire including USS Belknap (CG-26) and loss of British type 21 frigates HMS Antelope and HMS Ardent and the destroyer HMS Sheffield during the Falklands War.

There are real issues with the use of aluminum, since it softens, melts, and looses its structural integrity at lower temperatures than steel, as seen on HMS Amazon when it had a fire in 1977, but losses as a result of structural aluminum have frequently been exaggerated. Problems with cracking of aluminum superstructures have been largely as a result of the different expansion rates of mixed steel and aluminum construction.

In the case of Belknap, the collision severed fuel lines running outboard on the carrier and dumped huge amounts of fuel onto the ship, feeding the fire, while ammunition cooked off. Nevertheless the ship was saved by extraordinary DC effort.

The loss of Antelope and Ardent were evaluated to have not been the result of their Aluminum superstructure.

The Sheffield actually employed steel rather than aluminum in both its hull and superstructure, so aluminum construction played no part in her loss.

OPV 270 main specifications

  • Overall length : 84.00 m (275.5′)
  • Range : 8000 nm @ 12 kts
  • Endurance : 5 weeks
  • Speed : 22.0 knots
  • Crew : 40 persons
  • Passenger and VIP : 26 persons
  • Survivors : 35 persons

Japan Builds More XXLarge CG Cutters

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Japan Coast Guard patrol vessel PLH32 Akitsushima. Photo by Kaidai

NavyRecognition is reporting that the Japanese Coast Guard is once again building very large coast guard cutters with the launch of Reimei (PLH 33).

Mitsubishi Heavy Industries (MHI) recently launched a brand new patrol vessel for the Japan Coast Guard (JCG). This vessel is a variant of the Shikishima-class, with two previous vessels built in 1992 and 2013. Two more vessels are also scheduled to be built in the future (emphasis applied–Chuck).

This class is going to be something of an oddity, because it looks like there will be at least 30 years between the commissioning of the first ship and the fifth. In fact the Japanese may be planning to replace the first ship of the class with the fifth (that is only speculation on my part, but the Japanese do not keep there ships nearly as long as the USCG. Referencing my Combat Fleets of the World from 2013, the Japan Coast Guard had no ships older than 35 years).

Before the Chinese built their very large Coast Guard cutters, the two earlier ships of this class, Shikishima (commissioned 1992) and her sister ship, Akitsushima (commissioned 2013), were largest cutters in the world, at 150.0m (492 ft), 9300 ton (full load), twice as large as Bertholf class cutters.

The South Koreans have also built some exceptionally large cutters. None of these ships have particularly large crews. Crews are about the same size or smaller than the crews of the Bertholf class. All seem to be good for about 25 knots and have facilities for two helicopters.

Armament:

The first two Japanese ships don’t have the 76mm guns found on the extremely large Chinese and South Korean cutters, but they are well armed for cutters with four gun mounts on each ship. There does seem to be some variation in the way the Japanese ships are armed–not too surprising considering the first two ships were commissioned 21 years apart, and seven years will separate this third ship from the second of the class.

20mm-76_Gatling_pic

Japanese 20 mm/76 Gatling Gun. Note the camera for remote targeting. JMSDF Photograph.

Just about all Japan Coast Guard cutters have the 20mm Sea Vulcan, which uses the same 20mm guns as those in the Phalanx Close in Weapon System (CIWS) but in a simpler mount. They have a 3000 round per minute rate of fire and a reported effective range of 1,625 yards (1,490 m). The first ships of the class had two mounts forward of the bridge at the O-2 deck level.

The first two ships have two mounts for the Oerlikon 35mm. These guns have a 550 round per minute rate of fire per gun and a reported effective range against surface targets of 8,700 yards (8,000 m). The first ship has two twin mounts, but it appears the second has two simplified single mounts. If the third ship follows typical Japan Coast Guard practice, the larger mounts will continue to be in the 30 to 40mm range. If on the other hand, they mount something larger, it will mark a departure for the JCG, I would assume, in response to the increased militancy of the China Coast Guard.

In the world of Asian Coast Guards, it may simply be that their large size is their primary armament. These nations seem to regularly engage in shoving matches. In at least one case, the China Coast Guard reportedly sank a Vietnamese fishing vessel by ramming.