Daily Archives: December 18, 2018

NPa 500-BR Offshore Patrol Vessel

NPa 500-BR offshore patrol vessel is being developed by the Empresa Gerencial de Projetos Navais (EMGEPRON) in partnership with Centro de Projetos de Navios (CPN), primarily for the Brazilian Navy.

The Ministry of Defense of Brazil placed a contract with EMGEPRON and CPN to design and develop a new patrol vessel in April 2015. The preliminary design was completed in October 2016 and the design concept was launched during the LAAD Defense and Security exhibition held in Brazil in April 2017.


EMGEPRON announced plans to export the NPa 500-BR ship to international markets such as Africa, South America, and Asia in August 2017. A model of the patrol vessel was exhibited at the Rio International Defense Exhibition 2018 (RIDEX 2018), which took place in Rio de Janeiro, Brazil, in June 2018.

A tender for the construction of the vessel is expected to be issued in 2018.

The patrol boat is designed to perform multiple missions, including patrolling, surveillance, combat, military aid, search-and-rescue (SAR), and prevention of marine pollution in exclusive economic zones (EEZ).

It is also used to counter drug trafficking, smuggling and illegal fishing in EEZs.

NPa 500-BR offshore patrol vessel design and features


The NPa 500-BR patrol vessel will have a steel hull, while its superstructure will be built using aluminium. It will have a length of 57.2m, a beam of 8.76m and a maximum draught of 2.58m.

With a loaded displacement of 592t, the ship can carry up to 43 crew members.

The ship’s navigation bridge will be outfitted with SICONTA tactical control system to perform threat evaluation, weapon management, target tracking, electronic warfare control, and analysis of sensor data.

SICONTA tactical control system

Tactical and weapons control system that can be installed in aircrafts, ships and submarines.

Main characteristics:
– Manual and automatic targets tracking;
– Electronic warfare control; and
– Threat evaluation and targets designation.

Interface with:
– Surveillance, navigation and fire control radars;
– IFF;
– CME;
– Sonars; and
– Missiles.

Source marinha.mil.br

Up to two rigid-hulled inflatable boats (RHIBs) can be carried at the ship’s stern to conduct patrol and transportation duties at sea. The launch and recovery of RHIBs will be performed using a crane.


The patrol vessel can also be equipped with SICAV damage monitoring and control system as well as a propulsion monitoring system.

SICAV damage monitoring and control system

SICAV controls and indicates, in real time, the presence of smoke, temperature and flooding.

Main Features:
– Touch screen workstation;
– Ethernet network connection;
– VMIC architecture VME Standard; and
– QNX operational system.

Source marinha.mil.br

NPa 500-BR armament

The patrol boat can be armed with a remotely operated 40mm L/70 automatic anti-aircraft gun for engaging high-speed enemy aircraft flying at low altitudes. Mounted in the bow section, the gun will offer a rate of fire of 240 rounds per minute.

40mm L/70 automatic anti-aircraft gun

The low weight and compact Bofors 40 Mk4 gun system with its high rate of fire and ability to switch between optimized ammunition types – including the intelligent 40mm 3P all-target ammunition – provides high survivability and tactical freedom at all levels of conflict.

Source baesystems.com

An Oerlikon 20mm GAM-B01 machine gun will be installed amidships on both port and starboard sides to offer protection against aircraft.

Oerlikon 20mm GAM-B01 machine gun


Caliber: 20 mm
Barrel lenght: 1400 mm (55.1 inches)

Cartridge: 20×128 mm
Lenght of complete round: 20,3 cm (8 inches)

Rate of fire: 900-1000 rpm
Muzzle velocity: 1050 m/s (3440 ft/s)
Maximal range: effective surface 2000 m (2200 yards) / effective – aircraft 1500 m (1650 yards) / maximum 6800 m (7450 yards)
Feed system: 200 rounds on belt

Source seaforces.org

The patrol vessel can be optionally armed with a SIMBAD-RC remotely controlled anti-air self-defence system to provide self-protection for the ship. Located amidships, the lightweight twin launcher can deploy MISTRAL surface-to-air missiles, which will be effective against threats, including combat aircraft, helicopters, anti-ship missiles, and unmanned aircraft.

SIMBAD-RC remotely controlled anti-air self-defence system

SIMBAD-RC is a short-range, anti-air self defence system deploying two fire-and-forget MISTRAL missiles. It has been designed to provide a primary self defence capability on all warships or to complement the main air defences of first rank warships.

Featuring an automatic launcher remotely controlled from an interior terminal, SIMBAD-RC is ideally suited for ships with low crew numbers and for modern ship design requirements, particularly those relating to stealth and very fast craft concepts.

SIMBAD-RC provides an extremely effective defence capability against all threats including anti-ship missiles, combat aircraft, UAVs, helicopters, as well as small surface threats such as those presented by FIACs.

Depending on ship size and/or crew requirements, SIMBAD-RC offers a range of turret/SMU-RC configurations and system integration schemes. Being entirely operated by one interior-located operator, the SIMBAD-RC system offers high avaibility in all weather and sea conditions. Source mbda-systems.com 

Mistral surfrace to air missile


Type Surface to air missile
Diameter 93 mm body, 0.2 m wingspan
Length 1.86 m
Weight 19 kg
Guidance Infra-red passive homing
Warhead HE-Frag, 3 kg with 1 kg HE, impact and active laser proximity fuze
Propulsion Single-stage solid propellant rocket motor plus ejection motor
Speed Mach 2.5
Range 0.3 to 5 km effective
Altitude 5 m to 3 km
Engagement envelope ?
Remarks Container is 2 m and 24 kg

Source weaponsystems.net

A CORCED gyro-stabilised lightweight weapon station, capable of mounting 7.62mm or 12.7mm machine guns, can be fitted optionally for additional protection.

CORCED gyro-stabilised lightweight weapon station

CORCED is a gyro-stabilized lightweight weapon station, designed to be installed on the deck of the ship. This system allows remote operation of a machine gun in a turret with traverse and elevation movement, performing, remotely, aiming and firing of the gun using a console. The system can be used in patrol missions, recognition, engaging surface targets or low altitude air targets.

  • Optronic integrated system
  • Internal balistic computer
  • Stabilized in pitch, roll and training
  • Integrated “auto tracker”
  • Firing and reset control
  • Remote and manual operation mode
  • Fully compliant with MIL-STD standards

Type of machine guns

BRW M2 12,7mm or FN MAG 7,62mm

Ammunition capacity

300 (12,7mm), 460 (7,62mm)

Optical sensors

Daytime camera (zoom > 23x) Thermal (optional)

Angular velocity

Trail: >51°/s
Elevation: >51°/s

Angular movement

Trail: 360°
Elevation: -10° a 45°

Total Weight Tower

Tower: 170 kg
Console: 45 kg

Accuracy of stabilization

Erro < 1mrad (peak)

Supply voltage

115 VAC, 24 VDC

Current consumption

60 A (24VDC)

Maximum distance between the tower and the console:

Up to 30 m

External dimensions of the tower (mm)

1.096×1.243×650 (LxWxH)

Source ares.ind.br

Navigation and communications


The NPa 500-BR patrol boat can be fitted with optical-electrical sight, comprising TV and infrared cameras, to provide observation, surveillance, target identification and tracking, as well as fire control. The device also integrates a laser rangefinder to identify and designate targets.

A communications antenna to be mounted on top of the navigation bridge will be equipped with 3D surface search and navigational radars for navigation and surface surveillance.

An optional long-range acoustic device (LRAD) can be installed for long-range communications and electronic warfare suite for radio jamming capability.

Propulsion and performance of NPa 500-BR patrol boat


The patrol vessel will feature combined diesel and diesel (CODAD) propulsion system, consisting of two V16, four-stroke-cycle Caterpillar 3516C marine diesel engines. The power generating capacity of the engine will be between 1,230bkW and 2,525bkW. The ship will also feature a 200kW bow thruster.

2 x Caterpillar 3516C marine diesel engines

The 3516C propulsion engine is available with a wide range of ratings that meet IMO II regulations without any additional aftertreatment. These engines provide efficient operation with electronic governing, cold mode start strategy, and programmable low idle to minimize fuel consumption. The 3516C engine also incorporates a closed crankcase ventilation system to lower emissions.

Source cat.com

200kW bow thruster


It will offer a maximum speed of 20kt and can travel up to a distance of 2,800nm at a speed of 13kt. The autonomy of the NPa 500-BR patrol vessel will be 20 days.


Main material source naval-technology.com

Image are from public domain unless otherwise stated