Royal Thai Navy’s DW-3000F Frigate – Armament


ATLAS ELEKTRONIK to deliver Bow and Towed Sonar systems for new Royal Thai Navy frigate

18 December 2013

ATLAS ELEKTRONIK GmbH has been commissioned by the Korean yard Daewoo Shipbuilding & Marine Engineering (DSME) with the supply and integration of a bow sonar (ASO) as well as a low-frequency active towed array sonar (ACTAS) for a new frigate of the Royal Thai Navy. Delivery of the systems is planned to take place early in 2016. …

The ASO bow sonar operates in the frequency range between 6 and 9 kHz and provides a surveillance radius of up to 15 kilometres around the ship. This makes it most suitable for the self-protection of the ship. The towed array sonar ACTAS operates in the low-frequency range from about 2 kHz and permits observation of the sea space at ranges considerably above 60 kilometres, depending on the propagation conditions of the water. This gives the sonar an operational range that by far exceeds that of radars and the weapons range of submarines. The system is therefore not only ideal for hunting submarines but also for the wide-area reconnaissance of surface combatants.

DW 3000F class : 2 (one will be constructed in Korea and one in Local )


  • 1 × OTO Melara 76 mm
  • 1 × 20 mm Phalanx CIWS or 2 x DS-30M automated small calibre gun
  • 8 x Harpoon missiles
  • 8 cell Mk.41 vertical launch system for 32 x RIM-162 ESSM or SM-2
  • 1 × VL-ASROC
  • 4 × Mk.32 torpedo tubes with Mark 44 torpedoes

Source: defence.pk

1 × OTO Melara 76 mm CWIS1 × 20 mm Phalanx CIWS YouTube/Daily Military Defence & Archive 2 x DS-30M automated small calibre gun 30mm DS30M Mark 2 is a ship-protection system made by MSI-Defence Systems consisting of a 30mm Mark 44 Bushmaster II cannon on an automated mount. (wiki)A01169803150326601398 x Harpoon launch tubesagm84a8 x Harpoon anti-ship missiles The Harpoon is an all-weather, over-the-horizon, anti-ship missile system, developed and manufactured by McDonnell Douglas in excess of 67 nmi (124 km) depending on launch platform Sea-skimming cruise monitored by radar altimeter / active radar terminal homing 537 miles per hour (864 km/h)(240 m/s) (wiki)8 cell Mk.41 vertical launch system “quad-packed”32 x RIM-162 ESSM – RIM-162 Evolved SeaSparrow Missile (ESSM) is a development of the RIM-7 Sea Sparrow missile used to protect ships from attacking missiles and aircraft. ESSM is designed to counter supersonic maneuvering anti-ship missiles. ESSM also has the ability to be “quad-packed” in the Mk 41 VLS system, allowing up to four ESSMs to be carried in a single cell. Compared to the Sea Sparrow, ESSM has a larger, more powerful rocket motor for increased range and agility, as well as upgraded aerodynamics using strakes and skid-to-turn. In addition, ESSM takes advantage of the latest missile guidancetechnology, with different versions for Aegis/AN/SPY-1, Sewaco/APAR, and traditional target illumination all-the-way. The improved ESSM Block II will be fielded by the US Navy from 2020. (wiki)1 × VL-ASROC2 × Mk.32 torpedo tubes triple launch tubes eaca557e5dc4b37d601a665af0024f87Mark 44 torpedoes – The Mark 44 is a modular design, consisting of four main sections. The blunt nose contains the active sonar seeker with the 75-pound (34 kg) high-explosive warhead immediately behind it. The second section contains the guidance and gyroscopes. The third contains the 24 kilowatt seawater battery which uses silver chloride and magnesium electrodes with seawater acting as the electrolyte. Finally is the propulsion section which houses the electric motor, four rectangular control fins and two contra-rotating propellers. (not confirmed that it is this type)M2HB-02c2 x .50 caliber machine gun Nulka is an Australian designed and developed active missile decoy built by an American/Australian collaboration. Used aboard warships of theUnited States Navy (USN), Royal Australian Navy (RAN), United States Coast Guard (USCG), and Royal Canadian Navy, Nulka is a rocket propelled, disposable, offboard, active decoy designed to ″seduce″ anti-ship missiles away from their targets. It has a unique design in that it hovers in mid air while seducing the incoming anti-ship missile. The hovering rocket concept was initiated in Australia by the Defence Science and Technology Organisation (DSTO), and the system was designed, developed and then manufactured by AWA Defence Industries (AWADI) (now BAE Systems Australia). The word “Nulka” is of Australian Aboriginal origin and means “be quick”. (wiki)60038_561844200540709_1790266999_n

Sea Giraffe 4A medium- and long-range AESA surveillance radar

Sea Giraffe 4A antenna3 D Long range radar 350 km – (I’m guessing Sea Giraffe 4A medium- and long-range AESA surveillance radar but it has a range of 280 km only)


  • Automatic air and surface surveillance and tracking including tracking-on-jam
  • Classification of both hovering and moving helicopters
  • Target indication to weapon systems for both anti-air and anti-surface engagements
  • 360˚ mortar/rocket alert and weapon location
  • Target designation for long-range surface-to-air missiles

Extensive ECCM capability

The Sea Giraffe 4A provides extensive Electronic Counter-Counter Measure (ECCM) to meet the complex ECM environment of today and tomorrow. Methods of countering noise and deceptive jamming and chaff are included such as:

  • Ultra-low side-lobe levels including side-lobe blanking
  • Frequency agility; pulse to pulse, burst to burst, and scan to scan frequency agility
  • Constant False Alarm Rate (CFAR) to reject false alarms caused by clutter and/or noise jamming
  • PRF switching and PRF stagger with random jitters
  • Intermittent (or random) transmission to confuse hostile ESMs and anti-radiating missiles
  • Sector transmission that can be independently defined by the operator
  • Automatic selection of least jammed frequency
  • Automatic jammer detection and tracking in both azimuth and elevation
  • LPI waveforms


Sea Giraffe 4A baseline configuration

The Sea Giraffe 4A has the following main hardware units:

  • Antenna including RF parts and turntable (AU)
  • Liquid Cooling Unit (LCU)
  • Signal Data Unit (SDU)
  • Power Distribution System (PDS)

Upgrading and extended capabilities

  • Identification Friend or Foe (IFF) interrogator antenna
  • IFF interrogator
  • IFF transponder equipments

Technical data

Radar type Stacked beam 3D radar
Antenna type AESA, digital beam forming
Frequency S (E/F) band
Elevation coverage > 70 degrees
Rotation rate 30 or 60 rpm
Search volume 360° or in a sector
Instrumented range 280 km



Giraffe 4A and Sea Giraffe 4A: medium- to long-range radars, combining air surveillance, air defence, sense and warn and weapon locating capabilities in a single, low-footprint S-band AESA-based unit.

imageSea Giraffe 4A @saab

Sea Giraffe AMB

3 D Medium range radar 180 km – Sea Giraffe AMB

This multi-role 3D radar provides a full range of functions for simultaneous:

  • Air surveillance and tracking, including tracking-on-jam
  • Surface surveillance and tracking
  • Target classification of both moving and hovering helicopters
  • Navigation/close combat capabilities
  • Target indication to weapon systems for precision anti-air and anti-surface engagement
  • Gunfire support, including high-resolution splash spotting

The radar simultaneously detects small fast-moving targets at all altitudes and in severe clutter. The surface channel gives a high probability of detecting very small targets in close proximity to the surface, for example rib boats and periscopes.

The radar has been proven in all kinds of environments including regions with extensive ducting conditions.

The concurrently processing target returns from multiple digitally shaped narrow receive beams in elevation results in high altitude coverage and monopulse accuracy in elevation. The radar covers the full search volume every second.

In order to relieve operator interaction, Sea Giraffe AMB provides fully automatic operation on both air and surface targets, supported by a variety of different clutter maps and doppler processing to eliminate both land and weather-driven clutter.

Sea Giraffe AMB provides the most comprehensive Electronic Counter-Countermeasure (ECCM) capabilities available today including ultra-low antenna side-lobes.


Today the Sea Giraffe AMB has the designation AN/SPS 77 V(1) for the US Navy’s Littoral Combat Ship, LCS 2/4 and AN/SPS 77 V(2) for LCS 6 and higher.

Sea Giraffe AMB comprises the following main hardware units:

  • Antenna Unit (AU)
  • Transmitter Unit (TRU)
  • Signal and Data Unit (SDU)
  • Power Distribution System (PDS)

The following extended capabilities for the Sea Giraffe AMB baseline product configuration are available:

  • Stealth Radome
  • 360˚ mortar/rocket detection and alert (C-RAM)
  • Identification Friend or Foe (IFF) interrogator antenna
  • IFF interrogator
  • Improved detection range and redundancy with an additional transmitter unit

The stealth radome is built with Frequency Selective Surfaces (FSS) to minimise the Radar Cross Section (RCS) and infrared signature of the above-deck parts of the Sea Giraffe AMB. The radome is capable of carrying equipment on the top, for example an ESM, ELINT and/or a COMINT. The counter rocket, artillery and mortar alert function detects, tracks and classifies very small ballistic objects in severe clutter. The point of impact, the ballistic trajectory as well as the impact position are calculated. A warning signal of impact position is given well in advance, allowing the ship to perform an evasive manoeuvre in order to avoid being hit.


Radar type Stacked beam 3D radar
Antenna type 3D phased array, digital beam forming
Frequency C (G/H)-band
Elevation coverage > 70 degrees
Rotation rate 60 RPM
Instrumented range 180 km
Sea Giraffe AMBThe towed array sonar ACTAS operates in the low-frequency range from about 2 kHz and permits observation of the sea space at ranges considerably above 60 kilometres, depending on the propagation conditions of the water.Atlas-Elektronik-to-Supply-Sonar-for-Royal-Thai-Navys-New-Frigate..130908055403

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