Drug smugglers and pirates pose a very
different threat to naval vessels compared to traditional enemy forces.
As a result, the rise of the offshore patrol vessel has seen smaller,
faster and more agile patrol vessels grow in importance and popularity.
Liam Stoker profiles five of the most popular and emerging offshore
patrol craft.
The rising number of incidents involving drug
smuggling and piracy has led to an increasing demand for patrol vessels
capable of fulfilling a variety of roles and operational requirements.
Capable
of operating in and around shallow water and littorals, offshore patrol
craft combine high cruise speeds with efficient armaments in order to
counter fast-moving and agile vessels used by pirates and drug
smugglers, while also providing an operating base for naval helicopters
and fast-moving deployable boats used by special forces.
Armidale Class patrol boat
Acquired to replace the Freemantle Class patrol vessels, Australia's fleet of Armidale Class
patrol boats are based in Darwin and Cairns, reserved for use in
surveillance, interception and escort missions, and were first
commissioned in December 2003.
The main tasks of the Armidale
Class vessels are to support civilian authorities in custom patrols and
measures against illegal immigration, both key tasks for Australian
authorities. Although the vessel's cruise speed is approximately 12kts,
two Zodiac waterjet boats can be stored on the stern deck, allowing
rapid deployment of additional forces.
Due to the nature of the
waters surrounding Australia, the Armidale Class vessels have been
designed to conduct surveillance missions in conditions up to sea state
five, with wave heights of up to 4m, whilst also being able to
successfully operate within cyclonic weather conditions.
In terms
of armament, the patrol boats come armed with a Rafael Typhoon 25mm
stabilised naval gun mount with an ATK Bushmaster cannon, whereas BAE
Systems Australia has provided the vessels with its passive radar
identification system (PRISM III) in order to provide detection and
direction finding capabilities.
Holland Class patrol vessels
Damen Schelde Naval Shipbuilding was tasked with constructing the Holland Class Patrol vessels in December 2007 as part of a €467.8m project to provide the Royal Netherlands Navy with four offshore patrol vessels.
Due
to be commissioned between 2011 and 2013, the Netherlands' fleet of
Holland Class patrol vessels have been designed to support international
task forces, aiding in anti-piracy missions and counter-drug missions,
while also operating as support ships during crisis relief. The Royal
Netherlands Navy will deploy the vessels to the Caribbean and North
Seas.
The vessel's broad platform provides stability in marine
seas and has been constructed using thick steel, reducing its tensile
strength but increasing the vessel's capability to resist the impact of
small-calibre weapons more commonly associated with anti-piracy
missions.
All armaments onboard the vessel, which include a 76mm
Oto Melara Super Rapid gun and a 20mm Oto Melara Marlin WS gun, can be
operated remotely, while the vessel also comes with a fully equipped
hangar capable of supporting an NH-90 helicopter.
Sentinel Class fast response cutter
Being constructed as part of the US Coast Guard's (USCG) Deepwater programme, Sentinel Class
patrol boats have been commissioned in order to address USCG patrol
gaps and assist in immigration and drug interdiction missions within the
Caribbean Sea and Gulf of Mexico.
Following
the award of a $166.1m contract option in September 2010 for four
additional craft, the USCG's total order stood at eight vessels, worth
$410.7m, with the USCG planning to acquire a total of 58 patrol boats
within the vessel's operational expectancy.
A modified version of
the Damen Stan 4708 patrol vessel, the fast response cutter (FRC)
features a bow thruster for manoeuvring within narrow anchorages and
channels, underwater fins to resist rolling and pitching in large waves
and a Bushmaster 25mm chain-fed autocannon.
One particular
strength of the FRC is its versatility, with the vessels capable of
operating independently in a vast array of missions including coastal
security, marine environmental protection, search and rescue and
national-defence operations.
The vessels are also capable of remaining operational in sea state four, and can survive in sea state six.
L'Adroit offshore patrol vessel
France's L'Adroit offshore patrol vessel,
belonging to the Gowind Class of offshore patrol vessels, was launched
in May 2011 and was delivered to the French Navy in October 2011, having
successfully completed its sea trials two months prior. Although the
French Navy will carry out additional tests of its equipment and systems
until 2014, the ship is seen as vital to France's counter-piracy,
environmental protection and drug interdiction capabilities.
Capable
of providing 220 days of at-sea-availability each year, the L'Adroit
offers shelter for a 5t helicopter and a landing facility for a 10t
helicopter, as well as also carrying two rigid-hulled inflatable boats
(RHIB) for use by onboard forces. Fast commando boats can be covertly
deployed within five minutes and the vessel also has the capability of
launching naval UAVs.
The vessel can be equipped with both lethal
and non-lethal weapons. Whereas the main armaments of the L'Adroit
consist of a 20mm gun located on the foredeck and two 50 cal. machine
guns, the wings of the ship can be equipped with water cannons for
non-lethal dispersal of enemy ships.
M80 Stiletto
The future of offshore patrol could, however, lie in the design of the US next generation vessel - the M80 Stiletto.
Constructed
with carbon-fibre materials, the M80 posses a unique hull design
allowing the vessel to achieve speed, ride quality, payload capability
and provision for unmanned vehicle support that is currently unmatched
in the naval field.
The vessel, currently in field trials
conducted by the US Department of Defence, is designed for high-speed
military missions in shallow, littoral and near-shore waters. The
twin-M-hull vessel is capable of reaching speeds of up to 60kt, creating
an air cushion by recapturing the bow wave and using its energy in
order to produce less drag.
While also posing greater energy
efficiency, fleet costs are reduced due to higher reliability of
construction and maintenance, both sure to be increasingly attractive
for a navy forced to contend with budget restraints.
The M80 has
previously participated in Trident Warrior joint-force exercises and has
seen action in Colombia, participating in shallow-water drug
interdiction operations that resulted in the capture of 1,800lb of
cocaine.
* Article publicat a Naval Technology. Efectivament, les operacions contra pirateria, contraban i terrorisme, estan generant respostes en l'àmbit del pensament naval, i en conseqüència, en el disseny. Recomanem per això la lectura d'aquest article.
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