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Dassault Br.1150 Atlantic


Country of Origin: France.

Type: Maritime patrol and ASW aircraft.

Powerplant: Two 4638 kW (6200ehp) Rolls-Royce Tyne Mk 21 turboprops.

Performance: Max speed 355kt (658km/h). Patrol speed 169kt (315km/h). Service ceiling 32,810ft (10,000m). Range 7970km (4950 miles) with 10% reserve fuel.

Weights: Empty 24000kg (52,900lb), max take-off 43,500kg (95,900lb).

Accommodations: Normal crew of 10-12, comprising of pilot, co-pilot, flight engineer, three observers, radio operator, ECM/MAD operator, radar and IFF operator, tactical co-ordinator, two acoustic operators.

Armament: Internal bay can carry up to nine torpedoes or depth charges and other stores including AM 39 Exocet; four underwing hardpoints can carry rockets or ASMs.

Operators: France, Italy, Germany, Pakistan.

History:

The Atlantic resulted from a NATO requirement to find a replacement for the Lockheed Martin P-2 Neptune. The NATO requirement for a long range maritime patrol aircraft was issued in 1958. Breguet was the successful bidder, with its Br.1150 design selected over 24 other designs submitted from nine countries.
The Atlantic first flew in prototype form on October 21 1961 and entered service with the navies of France and Germany in 1965. In all 87 production Atlantics were produced through to 1974 by a European consortium led by Breguet. Other customers were Italy and Netherlands while Pakistan's three ex-French navy Atlantics were delivered in the mid-1970s.
Design features of the basic Atlantic include a double bubble fuselage, the lower portion of which is unpressurised and includes the weapons bay, US sourced ASW equipment and a Thompson-CSF search radar in a retractable radome. Germany also operates five Atlantics modified for Elint, while Thompson-CSF is upgrading Pakistan's aircraft.

Service with PN:

Three former French Navy Atlantic 1 maritime patrol aircraft were sold to Pakistan in the mid-1970s; a fourth was acquired later from the Netherlands, although one has since been lost. They are operated by No. 29 Squadron of the Pakistan Navy, co-located with No. 93 Squadron's EEZ Maritime Defenders at Mehran. Three more arrived from France but are to be used only to provide spares for the existing trio.
Equipment included a retractable radar, magnetic anomaly detector (MAD) tailboom, and an Arar electronic surveillance measures (ESM) pod on the fintip. Sonobuoys and marker flares are stowed in the rear fuselage. Flight and mission crews occupy the pressurized upper deck.
in 1993, Thomson-CSF has won three Pakistan contracts worth nearly $60 million for the modernization of maritime patrol aircraft (MPAs). The upgradation began in 1993 and four aircraft were mordernized by 1998. The first contract involved upgrading two Breguet atlantic MPAs, with an option to upgrade the Pakistani Navy's other two Atlantics later. Under the contract, Thomson-CSF acted as prime contractor in a 'global venture' which will install the company's Airborne Maritime situation Control System (Amascos) mission system with corresponding modifications to the airframe, on a turnkey basis. The first upgraded Atlantic was delivered in 1995 and was due to fly in Pakistan by the end of September.
Amascos system includes the Thomson-CSF/Daimler-Benz Aerospace Ocean Master radar, the Thomson-CSF DR 3000 A airborne electronic warfare ESM system with interferometry, the latest generation Thomson Sintra Activités Sous-Marines Sadang C1 sonobuoy signal processing system from Thomson Sintra Activites sous-Marines (designed and developed for the French Navy's Atlantique 2) and a (Sextant Avionique) navigation suite (GPS, computer, radio navigation).
Using a fuselage of an ex-Aeronavale Atlantic 1, the company produced the necessary kits to retrofit the Ocean Master surveillance radar, DR 3000 ESM (which required a new fin-mounted radome), the SADANG ASW processing system and a Sextant Avionique navigation system.
Ocean Master is designed to fulfil both civil and military maritime missions including economic exclusion zone (EEZ) surveillance; search and rescue (SAR); anti-surface vessel warfare (ASVW) and anti-submarine warfare (ASW); air-to-air detection. Two basic versions of the radar are offered: the Ocean Master 100 and the Ocean Master 400. These designations relate to the use of either a 100W fully coherent traveling wave tube (TWT) amplifier, or a 400W fully coherent TWT amplifier. Options and growth potential are available to meet specific user requirements, including inverse synthetic aperture radar (ISAR) processing to provide ship classification capability.
Ocean Master would perform the following other modes: multitarget track-while-scan operation; ground mapping; target classification; weather detection and beacon mode. Ocean Master in the basic version comprises only three units: antenna unit (360 rotation and/or sector scan); transmitter unit; exciter/ receiver/processor. In addition, the man- machine interface includes display and controls. The system is in production; first deliveries were made at the end of 1994. More than 30 systems have been ordered by France, Indonesia, Japan, and Pakistan including for use on Falcon 50, C-212 and Atlantique MPAs.