The MOD
has announced that the first unmanned minesweeping system has been accepted
by the Royal Navy. This welcome development comes after years of tests,
experiments and also delays. It is the result of 3 years of work following a
contract announced in march 2015 and is just a step, however important, within
a much larger enterprise.
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| RNMB Hussar in action, towing the Combined Influence Sweep package |
UK-only development; Combined Influence Sweep replacement
12 October 2005 was an historic day
for the Royal Navy, because the Hunt class minesweepers HMS Middleton and HMS
Ledbury conducted the last evolution at sea involving sweep gear, both the
Oropesa mechanical wire system and the combined influence sweep equipment. The
Royal Navy at that point had already operated unmanned, remotely controlled
sweep systems in 2003 during waterway clearance work in Iraq, notably the
opening of Umm Qasr. Under a UOR, a number of Combat Support Boats with remote
controls were used to tow the Mini Dyad System (MDS) produced by Australian
Defence Industries (ADI) and Pipe Noise Makers. Called Shallow Water
Influence Minesweeping System (SWIMS), they were sent ahead of the RN
minehunters as precursor sweeps against ground influence mines. The future of
MCM was taking the path of stand-off action through unmanned systems and it was
felt that the more than 100 years of manned ships sweeping were at an end.
The replacement for the sweep
equipment was to come through the Flexible Agile Sweeping Technology, or FAST. The
idea was to put two unmanned surface vehicles on the Hunt class vessels by
modifying their open, capacious stern area. FAST, however, proved anything but
fast, and even though a contract was signed in 2007 by the MOD with the Atlas-QED
consortium, comprising Atlas Elektronik UK, QinetiQ and EDO Corporation, the
resulting Technology Readiness Demonstrator never made it on the Hunt class.
FAST became a test platform that spent the following years doing all sort of
trials and demonstrations. Initially intended only for towing sweep kit, it
ended up testing remote deployment and recovery of Sea Fox unmanned underwater
vehicles, demonstrating that stand off clearance of minefields was possible.
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| The above photo, from Mer et Marine.com, show FAST during tests involving the launch and recovery of Sea Fox at range. The Sea Fox UUV is visible on the launch arm to the right. |
Atlas Elektronik UK continued to
work with the MOD and on its own, and eventually developed in-house the ARCIMS
(ATLAS Remote Combined Influence Minesweeping System) system, which has enjoyed
a first export success in an unnamed Middle East navy and has gone on to become
the much delayed replacement for the Hunt’s sweeping capability within the
Royal Navy.
An ARCIMS seaframe, but manned, was
delivered to the Royal Navy in 2014 for trials and development purposes, and
remains in service with the Maritime Autonomous System Trials Team (MASTT) of
the Royal Navy as RNMB Hazard.
On 6 march 2015, Atlas received a
12.6 million pounds order from the MOD for a first ARCIMS-derived system, in
the unmanned configuration, configured to tow sweeping equipment. The system
has now been accepted, and according to MASTT, which has already trialed it extensively,
the new boat is called RNMB Hussar.
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| The RNMB Hazard, manned precursor to Hussar, is used in tests since 2014 |
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| Redeployability directly from the shore after being transported by air, land or sea is a major advantage of the unmanned, stand-off MCM solutions. Here, Hazard is being moved. |
The 2015 contract for this system
included the groundwork for two further “Blocks” of work, to be confirmed and
funded later. Block 2 covers the integration with the Hunt class vessel: a
refit will be necessary to clear the stern and add an A frame for launch and
recovery of the 11-meters unmanned surface vehicle. A dedicate Reconnaissance
Unmanned Underwater Vehicle Hangar is also envisaged. Block 2 is not yet under
contract, nor is Block 3, which would consist of the acquisition of further
systems. In 2015, four were envisaged.
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| This old image from the early phases of FAST shows the look of a modified Hunt turned into FAST mothership. The general arrangement is unlikely to change much with Hussar and MMCM, but the modifications to the Hunt class are not yet under contract, at least as far as i know |
In late 2017 the First Sea Lord gave
a speech in which he announced that the unmanned MCM project would be “speeded
up” to deliver a workable system for “routine mine clearance” in UK waters
within 2 years. The 2015 contract was always meant to last 3 years, so there is
not an evident schedule change for the better; nor there is any evidence of
rapid progress on Block 2 and 3. The unmanned system can be launched directly
from the shore, so its use in UK waters probably does not require the
modification of a Hunt. In other words, I’m not sure the 1SL speech is
something to be happy about, or really a cut worded nicely.
In light of the coming of MMCM next
year, Block 2 and Block 3 might never take place as originally envisaged.
MMCM; working with France
The Royal Navy is working on a
second and much more ambitious programme, which is the Maritime MCM (MMCM)
system jointly funded and developed alongside France. The contract for the
manufacture of two full prototype systems, one for each country, was signed at
Euronaval in October 2016, and next year the system should be delivered for
trials.
The MMCM system-of-systems consists
of multiple unmanned / remotely operated elements that will enable stand-off
detection and disposal of mines up to 30 miles away from the mothership. The
system is centered on a 11-meters Unmanned Surface Vehicle which will be used
to tow a Synthetic Aperture Sonar and to deliver a Remotely Operated Vehicle
for mine disposal. A large, autonomous underwater vehicle is also included, for
reconnaissance of minefields.
Thales is tasked with delivery of
the integrated Portable Operations Centre (POC), which will use a command &
control solution jointly developed by Thales and BAE Systems. BAE Systems will
provide the Mission Management System, the virtual visualization and
experimentation suite. The BAE NAUTIS command and control system is expected to
be at the core of the MMCM solution. NAUTIS is already operational on the RN
minesweepers and in service in several other countries, from Turkey to
Australia.
The Royal Navy in the meanwhile has
been repeatedly using the Autonomous
Control Exploitation Realisation (ACER), a containerized command post, complete
with sensors, able to receive and fuse data streams from multiple unmanned
air, surface and underwater systems. The ACER
was successfully demonstrated at the Unmanned Warrior 2016 event, where it
integrated data from 25 different unmanned systems supplied by 12 different organizations.
For the occasion, it was embarked on the SD Northern River. It has also been
used from the shore at the British Underwater Test and Evaluation Centre (BUTEC)
range, and it was well visible on the flight deck of RFA Tidespring during
exercise Joint Warrior 2018.
Whatever command system the MMCM
employs, it will be important to integrate lessons from the ACER experience to
ensure that integration of new unmanned vehicles, including eventually the
rotary wing UAS that the Royal Navy hopes to put in service in the 2020s, is
smooth.
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| ACER on the cargo deck of SD Northern River during Unmanned Warrior 2016 |
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| ACER seen on the flight deck of RFA Tidespring during the recent Joint Warrior (thanks to RFANostalgia on twitter) |
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| Another ACER node seen again on SD Northern River while she plays prey to HMS Montrose's boarding team in recent exercises |
ASV Ltd was selected to deliver the
Unmanned Surface Vehicle, which will be a development of their Halcyon USV, an
exemplar of which has already been used by the Royal Navy during various trials
and experiments. The ASV will be similar in size to the ARCIMS / Hussar, and in
theory a modified Hunt could carry two in tandem.
One interesting question going ahead
is whether the RN buys further ARCIMS hulls in addition to the ASV Halcyon Mk2,
or if it standardizes on one of the two. It is unfortunate that two virtually
identical USVs are being procured, as having a single fleet would no doubt ease
logistic considerations.
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| Halcyon is visible to the right, ahead of RNMB Hazard, during Unmanned Warrior |
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| Halcyon deploying a ROV |
The Halcyon USV that the Royal Navy
has already employed has a displacement of over 8 tons and is capable of
carrying a 2,5 tons payload at ranges in excess of 300 nautical miles. The
vessel is 11.5 m long, has a beam of 3.5 m, is 2.9 m high, and can achieve a
top speed of 29 kt (25 kt when fully loaded). It features a full navigation
suite comprising GPS, radar, AIS, compass, and chart plotter; forward-looking
EO cameras; a pan, tilt, and zoom camera; mission planning and mission
management system; and a payload management system. The MMCM USV derivative will
not dramatically depart from these dimensions, meaning that deployment from a
Type 26’s mission bay will be another possibility.
The Hussar is similarly sized: 11
meters long, with a beam of 3.2m and a draft of 0.5m and a payload of around 3
tons. Propulsion is on two engines with water jet, giving an unladen max speed
of some 40 knots and a speed of up to 15 knots while towing the sweep gear.
Atlas Electroniks and Rolls Royce
have recently completed a
demonstration campaign with an ARCIMS fitted with an autonomous collision
avoidance system.
It will be interesting to see how
the Royal Navy moves in the future in regards to the unmanned surface vehicle
element.
The autonomous underwater vehicle
will be a derivative of the French ECA A-27M. With a speed of 6 knots and an endurance of 40
hours, the A-27 can dive down to 300 meters while carrying a suite of sensors which
will include the Thales SAMDIS advanced syntheric aperture sonar, first
demonstrated during 2014.
The SAMDIS, but in towed form, will
also be streamed by the Halcyon-derivative USV, and will be the primary mine
detection sensor.
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| A-27M AUV |
The mines will be destroyed thanks
to a multi-shot, reusable Remotely Operated Vehicle provided by SAAB. The Multi-Shot
Mine Neutralisation System (MuMNS) could, in other words, replace the current
Sea Fox, which was born as a one-shot system. There are two drones under the
Sea Fox name: one, reusable, is used for reconnaissance, while the disposal
system is sacrificed in the explosion that removes the mine. In more recent
times, an add-on mask known as “COBRA” has made Sea Fox reusable by introducing
the possibility of detaching the disposal charge and sail away, but the MuMNS
is born with this concept of operation already in mind. The ROV can be operated
down to 300 meters depth, and thanks to its “storm” magazine can actually carry
other payloads in alternative to the mine disposal system.
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| SAAB MuMNS |
Wood & Douglas is responsible
for the communications between the elements of the MMCM system.
Currently, the main unmanned
underwater vehicles employed by the survey and MCM flotilla are the REMUS 100
and 600 by Hydroid. Recently, the MOD has contracted an extension of support
arrangements to ensure that these systems remain operational at least out to September
this year, while a replacement contract is negotiated.
The REMUS 100 is used for Very
Shallow Waters reconnaissance and its capability has
been expanded in 2012 with the addition of extra sensors. A dozen systems
should be in operation.
REMUS 600 can dive down to 600
meters for reconnaissance, lasting up to 70 hours. It can be reconfigured to dive
down to 1500 and even 3000 meters. Additional sensor modules are added at the
front. The basic payload suite consists of dual frequency Side Scan Sonar, CTD
(Conductivity, Temperature and Depth) and pressure sensor.
Obviously, these systems are very
important to the MCM mission and their extension in service and / or
replacement will have to operate alongside the sweep and MMCM modules, and
eventually possibly “become one” with said systems. The sweep payload itself
would become just a component of the wider MCM system of systems.
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| REMUS 100 |
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| Deploying REMUS 600 |
Both Hunt and Sandown are being
life-extended and upgraded. The Hunt class is receiving new Caterpillar C32 diesel
engines that replace her old Napier Deltics; and the Sandown class underwent
the the Sandown Volvo Generator
Programme (SVGP) that replaces the ageing Perkins CV8 diesel
generators with more efficient Volvo Penta D13 Marine diesel generators. The
first vessel to receive this upgrade was HMS Bangor, during a dry dock support
period at Rosyth undertaken by Babcock in 2014.
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| Hunt class engine replacement |
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| Hunt class: the open stern is reconfigurable with relative ease, unlike on Sandown vessels. Note the white dome of the Satcom, added in the last few years, and the minigun positions, standard op Kipion fit |
The sonars
fitted to the two classes have received significant updates: the Hunt class,
with the hull-mounted Type 2193 sonar, are extremely good at detecting mines in
shallow waters, down to 80 meters. The Sandown, with the multifrequency
variable depth sonar system Type 2093, can hunt mines down to 200 meters depth.
Both sonars have been improved with wideband pulse compression technology which
allows for long-range detection and classification of low target echo strength
mines by optimising performance against reverberation and noise simultaneously.
The capability of these sonars will
have to be replaced though unmanned vehicles as part of the future solution
going into the post-MCM ship era.
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| US Navy unmanned assets are often found in the Gulf on board RFA Cardigan Bay |
With the coming of MMCM, where do
Block 2 and 3 of the Sweep technology contract sit?
Block 2 is arguably more necessary
than ever, but the Unmanned Vehicles Hangar and launch and recovery equipment
should not be just Sweep-focused, but more widely focused on the whole package.
Going ahead with a single USV type
would be desirable, so the Sweep module should go on as a payload to be towed
by whichever of the two USVs prove more successful.
As a consequence, Block 3 could have
to include the migration effort and the delivery of more sweep modules but
perhaps not more ARCIMS boats.
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| HMS Echo, a survey ship, has spent months as NATO MCM Squadron flagship. Here she is in La Spezia, Italy, in September 2017, embarking unmanned vehicles, training mines and other equipment. A sign of things to come. |
There is no telling what the Royal
Navy is currently planning to do. Information is extremely scarce, but already
in 2014, in the Naval Engineer magazine, the Sweep module was indicated as a
component in the wider solution. Both Hussar and the incoming MMCM are, once
more, prototypes, and it will be important to bring them together and harmonize
the two programmes into one.
Motherships, not minehunters
The successful delivery of the whole
future MCM package will transform the way mine clearance operations are carried
out. If all goes well, in the new year the Royal Navy will finally be able to abandon
its last reservations about the viability of stand-off mine clearance and begin
crafting the course for the post-dedicate minehunter hull era.
France has already decided that it
will no longer build dedicate, expensive, amagnetic hulls for the MCM mission.
The latest Military Planning Law included funding to procure the first twonew-generation motherships by 2025, with two more to follow. The mothership
will be large, steel-hulled, and flexible enough to cover other roles as well
as MCM. Two designs are being considered: the NS 04 is a SWATH (Small
Waterplane Area Twin Hull) complete of flight deck and hangar for medium
helicopters as well as a large cargo / mission space in the stern for storage,
launch and recovery of the unmanned vehicles.
The second design is a catamaran,
with the same base characteristics. Other vessel designs, including more
traditional monohulls, have been proposed. BMT in the UK has recently put
forward the Venari, and years ago had proposed the Venator. These vessels all
bring capabilities commonly found in OPVs, making them suitable for
constabulary tasks as well as specialized MCM and hydrographic missions.
France’s future MCM programme
(SLAMF, in French) intends to replace the current flotilla of Tripartite MCM
vessels with 4 motherships, with another four vessels for Divers support,
replacing four existing ships. Numerically, the contraction from 11
Eridan-class minehunters to four motherships is quite impressive, but the new
vessels will be multi-role, and more easily deployable. Further units could be
built if the same hull is selected for the new survey vessels to be ordered in
the early 2020s.
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| NS04 |
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| The designs being considered for the french mothership |
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| BMT Venator 90 proposal |
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| Above, the BMT Venari proposal for a future mothership |
Their pre-MMCM demonstration
project, the ESPADON, launched in 2009, delivered an impressive optionally
manned catamaran, the Sterenn-Du,
displacing 25 tons, 17 meters long and 7.5 meters wide. Launched in 2010 and
then employed in a vast range of tests, the Sterenn-Du is equipped with a
launch and recovery “cage” between its two hulls. When the unmanned underwater
vehicles return to the cage, they plug into connections that enable to
downloading of the data collected. The Sterenn-Du was remotely operated in sea
state up to 4, successfully carrying out launches and recoveries at range. The French
navy does not exclude the possibility of using such large USVs again in the
future, even if for the MMCM programme they have adopted the british approach
of using a smaller platform.
For France, the ESPADON project
removed all hesitations about the future of MCM being unmanned and stand-off.
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| The impressive Sterenn-Du, head on (above) and from the stern (bottom), seen with the launch and recovery cage lowered in the water, in this photo by mer et marine.com |
Despite years of work with FAST, the
Royal Navy has instead not formally closed the door to the possibility of
building a novel class of MCM-specific hulls, but this is looking more and more
unlikely. According to current timelines, in any case, there will be plenty of
time not just to evaluate MMCM and put it into service, but also to see the
first French motherships enter service. The Royal Navy does not expect new
vessels for the MCM mission before 2028, although a decision on the design will
have to happen quite a lot earlier than that, considering how horrendously slow
the british procurement and shipbuilding efforts can be. If ten years for
delivering a Type 26 are any indication, the 2028 date for the first next
generation mothership might actually end up proving to be hopelessly optimistic.
The programme that will deliver the
future capability is known as MHC, MCM & Hydrographic Capability and
deliberately envisages the replacement of not just Hunt and Sandown but of the
survey ships Echo and Enterprise as well. Until late 2013 it was MHPC, with the
P standing for “patrol”, but this was dropped after the order for the River
Batch 2 vessels had been signed.
It would be extremely shortsighted
to not take note of the multi-role capability of these new motherships and make
sure they can adequately cover the “patrol” function as well. The removal of
the P from the programme acronym is a most unwelcome development which is to be
hoped will be reversed, because to not grasp the full range of advantages of
having a new class of deployable ships would be criminal.
The unpleasant sensation, common to
many other areas across the MOD, is that planning is so constrained by
short-termism that the relationship between programmes is regularly
misunderstood or deliberately ignored. From the small to the huge things, it
seems like project offices are unable to talk to each other and ensure that the
overlap, where it exists, is of the good rather than of the bad kind. Was it
truly impossible to avoid developing two USVs for the same role? Was it
intentional as a form of “parachute” in case of issues with one of them?
At a far greater scale, why is the
relationship between River Batch 2, Type 31 and MHC so confused? The Royal Navy
risks to move from a fleet of virtually only “ships of the line” escorts to a
fleet with no less than 3 low-end, constabulary capable classes more or less
overlapping each other. Worse, it might deliberately handicap the MHC
mothership to artificially eliminate the overlap with River B2.
The Royal Navy needs to put order in
its ideas, and ensure that the three programmes work together, not one against
the other.
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| Earlier french designs for the mothership as shown by Mer et Marine |
Until the new motherships arrive,
the unmanned systems (both the Sweep and the MMCM kits) will be used initially
in home waters, probably directly from the shore. Deployment at sea can happen
from a multitude of different vessels, and we can reasonably expect to see SD
Northern River’s capacious deck filled up with these systems in a future Joint
Warrior.
The interim mothership, however,
should still eventually be the Hunt. It will be extremely interesting now to
see if, when and how the first Hunt vessel is modified for the new era. The
Hunt class, unlike the Sandown, has an essentially open stern where the sweep
equipment used to be carried and operated from. For over a decade the RN has
planned to modify this open space, but the project has been constantly delayed
and, in a surprise move, in December last year two Hunt vessels had their refit
and life extension cut short by early decommissioning as part of budget cuts.
The SDSR 2015 mandates that a third
vessel will eventually bow out before 2025, leaving 12 between Hunt and
Sandowns, and further cuts could reduce this number even further.
From the outside, the early
decommissioning of HMS Quorn and HMS Atherstone looks symptomatic of the
gravity of the crisis the MOD is constantly drowning into. The loss of two of
the “reconfigurable” ships is in antithesis with over 10 years of work, plans
and experimentations. I can’t know what the exact reasoning was behind the
closed curtains of the MOD, but their hasty cut smells of pure desperation.
Is the unmanned future of MCM “speeded
up” as the MOD claims? It doesn’t look like it at all. The delivery of the
first sweep system is a major step in the right direction, but Hussar alone is just
a beginning, 13 years after the legacy sweep capability was lost.
The modification of the first Hunt
isn’t yet in sight; the procurement of other sweep systems might or might not
happen. More information is needed on what the plan is, and we all know how
helpful the MOD is when it comes to explaining itself.
It is really a bittersweet picture.
A step has been moved, but it is extremely hard to share the triumphalism of
the MOD press release.
