Daily Archives: December 11, 2015

L’Adroit Offshore Patrol Vessel, France

L’Adroit is a Gowind Class offshore patrol vessel (OPV), which was designed and built by DCNS for the maritime safety and security (MSS) missions of the French Navy.

The OPV was launched in May 2011. It was constructed between May 2010 and June 2011 at Toulon naval base in France. It was officially christened in June 2011 and sea trials began in July 2011.

In June 2011, DCNS partnered with Austrian company Schiebel for integrating a Camcopter S-100 unmanned air system (UAS) onboard L’Adroit. The UAS completed trials in August 2011.

Camcopter S-100

Camcopter S-100 unmanned air system (UAS)

Schiebel’s CAMCOPTER® S-100 Unmanned Air System (UAS) is a proven capability for military and civilian applications. The Vertical Takeoff and Landing (VTOL) UAS needs no prepared area or supporting launch or recovery equipment. It operates day and night, under adverse weather conditions, with a range out to 200 km, both on land and at sea. The S-100 navigates automatically via pre-programmed GPS waypoints or can be operated directly with a pilot control unit. Missions are planned and controlled via a simple point-and-click graphical user interface. High-definition payload imagery is transmitted to the control station in real time. Using “fly-by-wire” technology controlled by redundant flight computers, the UAV can complete its mission automatically in the most complex of electromagnetic environments. Its carbon fiber and titanium fuselage provides capacity for a wide range of payload / endurance combinations. Source schiebel.net

The maximum and cruise speed of the Camcopter S-100 UAV is 222km per hour and 101km per hour, respectively. It has a maximum endurance of six hours.

The vehicle’s range ceiling is 180km and its service ceiling is 5,486m. The UAV weighs around 100kg and has a maximum take-off weight of 200kg. Source airforce-technology.com

Camcopter S-100 unmanned air system (UAS)

The French Navy took delivery of L’Adroit from DCNS in October 2011. The new ship and its advanced equipment and systems will be tested by the French Navy until 2014.

L’Adroit 2015

Name No Builder Laid down Launched Comp Fate
L’Adroit P725 DCNS, Lorient 10/6/2010 18/5/2011 19/3/2012 in service (2018)

Source navypedia.org

Design of the Gowind Class offshore patrol vessel

e6605-adroit2bpicClick to enlarge and save the image to view the details: modified photo of L’Adroit, lead ship of Gowind/Kership class offshore patrol vessels. For high resolution image click here. – Image: navalanalyses.blogspot.com

L’Adroit was designed by DCNS under a self-funded programme. The design includes a semi-planing steel monohull. The hull was assembled at the Lorient shipyard of DCNS.

The superstructure of the ship has a pyramidal shape with flat geometric panels. It provides shelter for a 5t helicopter and landing facility for a 10t helicopter. It can carry two rigid-hulled inflatable boats (RHIBs) and also has full provisions for UAV operations.


It can offer covert deployment of fast commando boats within five minutes. The ship is also provided with a helicopter / UAV flight deck.

Ships interior

37007Poste équipage (© : MER ET MARINE – VINCENT GROIZELEAU) Crew station – Image: meretmarine.com36991Cuisines de L’Adroit (© : MER ET MARINE – VINCENT GROIZELEAU)  – Image: meretmarine.com36974Sas pour l’embarquement de vivres et matériels (© : MER ET MARINE – VINCENT GROIZELEAU) 36975Coursive de L’Adroit (© : MER ET MARINE – VINCENT GROIZELEAU) 36978Locaux réservés aux commandos (© : MER ET MARINE – VINCENT GROIZELEAU) 36969Semi-rigide dans la niche tribord (© : MER ET MARINE – VINCENT GROIZELEAU)   – Image: meretmarine.com

Helicopter hanger & Landing pad

Plateforme hélicoptère (© : MER ET MARINE – VINCENT GROIZELEAU)  – Image: meretmarine.com36970Abri hélicoptère de L’Adroit (© : MER ET MARINE – VINCENT GROIZELEAU) Hanger – Image: meretmarine.com

NHIndustries NH90: Details

Eurocopter AS565 Panther: Details

L’Adroit has an overall length of 87m, beam of 13m and design draught of 3.3m. The full load displacement of the ship is 1,450t. It can complement crew of 30 and has space for 30 passengers. It has an endurance of three weeks and a range of 8,000 nautical miles at a maximum speed of 21kt.

Boat launching ramps

36963Boat launching ramps (©: MER ET MARINE – VINCENT GROIZELEAU) – Image: meretmarine.comRHIB launch from one of the two stern ramps Photo: Marine Nationale – Image: navalanalyses.blogspot.comZodiac Hurricane 935 RHIB  – Image: navalanalyses.blogspot.com

360° panoramic bridge

GROIZELEAU) – Image: meretmarine.comPasserelle de L’Adroit (© : MER ET MARINE – VINCENT GROIZELEAU)  – Image: meretmarine.comPasserelle de L’Adroit (© : MER ET MARINE – VINCENT GROIZELEAU)  – Image: meretmarine.comPasserelle de L’Adroit (© : MER ET MARINE – VINCENT GROIZELEAU)  – Image: meretmarine.comPasserelle de L’Adroit (© : MER ET MARINE – VINCENT GROIZELEAU)  – Image: meretmarine.comLe PC Avia (© : MER ET MARINE – VINCENT GROIZELEAU) – Image: meretmarine.com

The 360° panoramic bridge and the integrated mast give L’Adroit’s crew reliable information acquisition resources. The minimal superstructure of the ship leaves a substantial space available for air operations (helicopters, UAVs) and for launch and recovery of surface assets (RHIBs or USVs). L’Adroit’s missions are managed by the POLARIS® combat system, which supplies essential detailed information on the ship’s environment, acquired by various detectors, deployed sensors and other ships integrated into the surveillance network. The mission system can also include MATRICS®, a maritime surveillance system capable of detecting suspicious course profiles automatically. Source wikiwand.com

Performance of DCNS’ L’Adroit

L’Adroit can be used for maritime safety and security missions, which include counter-piracy, fisheries surveillance and environmental protection. It can also be used for humanitarian aid, drug interdiction, as well as rescue and search operations.

The vessel is mainly used for conducting maritime surveillance and reconnaissance missions and anti-piracy and anti-smuggling operations. It is capable of providing 220 days of at-sea-availability in a year.

Weapon and armaments onboard the French Navy craft

L’Adroit can be fitted with lethal or non-lethal weapons. The ship is equipped with a 20mm gun on the foredeck. It has an outreach of about 2km and can be operated manually. It is also equipped with two 50 cal. machine guns.

20F2 gun 20mm gun/90 cal modele F2 gun

The 20F2 is the navalized version of the GIAT CN-MIT 20 M693 (Canon Mitrailleur 20 mm Modèle 693), formerly the Hispano-Suiza 820. This weapon is also used by the French Army.

The M621 is a low-recoil gun which has been mainly used on helicopters and small aircraft, but a navalized version was developed in the late 1980s. Recoil is minimized by the use of a muzzle brake and a shock-absorbing mount.

Dean Wingrin

Gun Characteristics

Designation 20 mm/90 GIAT M693 CN-MIT-20F2
20 mm/73 GIAT M621
Ship Class Used On France: Florèal, Tripartite minelayers, P400, CDIC and EDIC classes
Belgium: Tripartite minelayers
Indonesia: Tripartite minelayers
Malawi: Kasunga
Netherlands: Tripartite minelayers
Pakistan: Tripartite minelayers
Saudi Arabia: NAJA 12 class
Date Of Design Late 1970s
Date In Service 20F2: 1983 (Naval Version)
M621: 1988 (Naval Version)
Gun Weight 20F2: N/A
M621: 104 lbs. (47 kg)
Gun Length oa 20F2: N/A
M621: 87 in (2.207 m)
Bore Length 20F2: about 71 in (1.800 m)
M621: about 57 in (1.460 m)
Rifling Length N/A
Grooves N/A
Lands N/A
Twist N/A
Chamber Volume N/A
Rate Of Fire 20F2: 800 rounds per minute cyclic
M621: 740 rounds per minute cyclic
Range of 20F2
Elevation HE AP
Effective 2,200 yards (2,000 m) 1,300 yards (1,200 m)
Maximum 10,960 yards (10,020 m) 7,400 yards (6,770 m)

Source navweaps.com

2 x 50 cal. machine guns

Two 50 cal. M2HB 12.7mm heavy machine guns

Guns raging up to 10km outreach with 76mm remote control range can be fitted to the vessel.

The two side wings of the ship can be equipped with two water guns of 200m outreach each. The wings can also be fitted with small calibre weapons raging between 500m and 1km and long range acoustic devices. The front deck of the ship can host two double surface to surface missile ramps (SSM40).

Water guns

One of the two water cannons Photo: Christina Mackenzie – Image: navalanalyses.blogspot.com

The ship also features an electronic warfare suite.

The vessel is equipped with Scanter 20 Terma 01 I-Band surface search radar and Sagem EOMS (electro optical multisensor system) NG. It is also equipped with a Sagem SIGMA 40D inertial measurement unit, LinkSrechts Helicopter visual landing aid system and HF/VHF/satellite communications suite. The ship is well equipped with Polaris combat management system.

Scanter 20 Terma 01 I-Band surface search radar

L’Adroit (© : MER ET MARINE – VINCENT GROIZELEAU) – Image: meretmarine.com

The see-through composite radome houses two Terma 2D surveillance radars, the Scanter 4102 and the Scanter 6002, sharing the same antenna (dual Scanter radar suite). Scanter 4102 is a general medium range surveillance radar while Scanter 6002 is Terma’s most modern X (I)-band 2D solid state radar optimized for improved surface and low airspace situational awareness in all weather conditions (for example very small non-metallic targets in sea states 4-6) and to provide the approach control for the helicopter. These characteristics of Scanter 6002 make it ideal for search-and-rescue (SAR) operations. This conical radar transparent mast structure provides the sensors that are mounted inside a full 360-degree coverage. The upper part of the radome hosts the UAV guidance antenna. The mast supports a FLIR Talon located at the aft side, a navigation radar at the front side, an IFF, a USV guidance antenna, Thales Vigile LW Radar Electronic Support measures (R-ESM) and Thales Altesse Communication Electronic Support Measures (C-ESM). Source navalanalyses.blogspot.com

Single mast (©: DCNS)  – Image: meretmarine.comSingle mast (©: DCNS)  – Image: meretmarine.com

Vision 360, robustness and ease of maintenance

Its advantage is to offer a panoramic vision without the sensor detection field is masked by another mast, as c ‘Is traditionally the case. For the electrical supply and the information gathered by the equipment located at the top of the structure, small cable trays were integrated into the radome, the proximity with the Scanter antennas making them invisible to the radar. “It’s like putting a finger in front of your nose, you can not see it! “Joked Jacques Le Ven and Denis Quiltu, respectively responsible for the unique mast of the Adroit and responsible for the air surface combat department and unique masters projects at DCNS. “This concept offers many advantages. It provides 360 degree vision, not only for the systems, but also for the crew, which is very interesting in the fight against asymmetric threats. Vertical alignment of the sensors avoids interference, and the rotating antenna under the radome is protected from external stresses, which results in a need for less power to operate. The equipment is also accessible from inside the vessel, which makes maintenance easier. ”  Translated by google – Source meretmarine.com

FLIR Talon

FLIR Talon. Photo: FLIR

FLIR’s Talon compact EO/IR sensor is integrated with the Polaris Combat Management System (CMS) to detect vessels and other objects >10 Km standoff range during EEZ and patrol duties. The the Talon provides up to six payloads: thermal imager, color CCD, low light, laser pointer or laser illuminator, laser rangefinder, and IMU/GPS. Source navalanalyses.blogspot.com

Thales Vigile LW ESM

Thales Vigile LW ESM. Photo: Thales

Sagem EOMS (electro optical multisensor system) NG

On the roof of the bridge there is a second navigation radar and at the base of the mast a Sagem EOMS NG multifunction optronic system. EOMS NG is a multifunction optronic system, unique of its kind. Designed for surface vessels, it combines long-range infrared panoramic search and track (IRST) with electro-optical gun fire control in a single unit. It is a highly effective solution for self-protection against symmetrical and asymmetrical, surface or air threats as it provides automatic detection and tracking, identification, and gun engagement of all surface and air targets, from anti-ship sea-skimming missiles to fast incoming attack craft. It is fully remote controlled from the ship’s Combat Management System (CMS) or via the operator console provided. Source navalanalyses.blogspot.com

Polaris combat management system

The Polaris combat management system, developed by DCNS, integrates GPS, AIS and ADS-B (Automatic Identification System and Automatic Dependent Surveillance – Broadcast), two surveillance radars, two navigation radars, two electro-optical systems and a communication interceptor system. Polaris enables missions such as anti-piracy, convoy protection or surveillance and protection of coastal areas and exclusive economic zones to be carried out. It offers scalable functions which are designed to provide a clear assessment of the tactical situation at sea and interoperability with other units as well as a maritime combat management capability. This mission system integrates the latest technological advances such as the use of drones, long-range surveillance, automatic detection and analysis of suspect behaviour of ships, decision-making aids and secure access to civilian networks and information systems. In its anti-surface warfare version, it also manages the use of guns and short-range self-defence missiles. Source navalanalyses.blogspot.com

Countermeasure technology on the L’Adroit OPV

Countermeasures are provided by Thales Altesse and Vigile LW ESM/COMINT system and Lacroix defence and security sylena decoy system. An integrated mast provides 360° radar coverage for responding to asymmetric threats.

Sylena decoy launcher (lower left) – Image: navalanalyses.blogspot.comCrew members filling the decoy launcher – Image: navalanalyses.blogspot.com

L’Adroit is fitted with two Anglo Belgian Corporation V12 diesel engines rated at 5,600kW each at 1,000rpm. The engines are powered by two shaft lines with controllable pitch propellers of combined diesel and diesel (CODAD) propulsion system.

The propulsion system includes water-jets which offer superior manoeuvrability in shallow waters.

Le compartiment machines de L’Adroit (© : MER ET MARINE – VINCENT GROIZELEAU)  – Image: meretmarine.comLe compartiment machines de L’Adroit (© : MER ET MARINE – VINCENT GROIZELEAU)  – Image: meretmarine.comPC machines L’Adroit (©: SEA AND MARINE – VINCENT GROIZELEAU) – Image: meretmarine.com



Displacement standard, t 1100
Displacement full, t 1500
Length, m 81.5 pp 87.0 oa
Breadth, m 13.0 wl 15.0 deck
Draught, m 3.80
No of shafts 2
Machinery 2 ABC DZC diesels
Power, h. p. 8160
Max speed, kts 21
Fuel, t diesel oil
Endurance, nm(kts) 8000(12)
Armament 1 x 1 – 20/90 F2, 2 x 1 – 12.7/90, 2 x 1 – 7.6/90, helicopter deck, S100 Serval UAV
Sensors 2x nav., Scanter 4100, Scanter 6000 radars, EOMS-NG e/o detector, Agile IR e/o detector, Vigile, Altesse ECM suites, Sylena decoy launcher, Polaris-Matrics CCS
Complement 32 + 27 passengers

Characteristic source navypedia.org

Main material source naval-technology.com

Images are from public domain unless otherwise stated

Revised Feb 14, 2017

Updated Oct 06, 2018