• Saturday, December 14, 2019

DEW Starts Manufacture of Fast Patrol Boat

Discussion in 'Bangladesh Defence Forum' started by Bilal9, May 10, 2015.

  1. Bilal9

    Bilal9 ELITE MEMBER

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    [​IMG]

    Keel for the first two of a large batch has been laid (around twenty within the first five years) at Dhaka Dockyard Engineering owned by the Navy. Looks like a large auto-cannon up front but don't know what type.

    LENGTH OVERALL : 43.40 M
    LENGTH WATERLINE : 41.35M
    LENGTH BETWEEN PERPENDICULAR : 40.90M
    BREADTH MOULDED : 6.40M
    DEPTH MOULDED : 3.60M
    DISPLACEMENT (FULL LOAD) : 235 TONNES
    MAXIMUM SPEED : 25 KNOTS

    PROPULSION ENGINE
    BRAND : DEUTZ
    CYCLE : 4 STROKE
    NO. OF CYLINDERS : 16 & V-TYPE
    POWER : 3000 HP
    RPM : 1800 RPM

    GEARBOX : ZF7600, RATIO : 2.565:1
    GENERATING SET : CUMMINS CCFJ120J-KC.
    ENDURANCE : 1500 NM
    CLASS : CHINA CLASSIFICATION SOCIETY

    Compare this to the recent USCG Sentinel Class Cutter, then you'll realize how close these are in design, albeit smaller. I've been predicting for two years that the Chinese would finally get on the ball on this design and they have. These are far faster, lower slung and have excellent sea-keeping qualities (less roll and pitch) in heavy seas than existing Island Class cutters (FPBs).

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    Here is a recent Sentinel Class, Bernard C. Webber, at full speed. She's a beauty...
    Notice the mini-CIWS (auto-cannon) mounted aforeships.
    [​IMG]
     
    Last edited: May 10, 2015
  2. Bilal9

    Bilal9 ELITE MEMBER

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    The USCG sentinel class is derived from Damen Stan patrol 4207 class. Damen designed a range of sizes based on the innovative 'Sea Axe' bow design. These ships are well known for their sea handling capabilities and comfort. Many are powered by Caterpillar and Deutz engines. The United States Coast Guard is planning a fleet of 24-34 cutters as the Sentinel class

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    HMC Valiant of the UK Border Agency.
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    Honduran Navy patrol vessel 4207 series FNH 1401 Lempira
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    Bangladeshis should feel proud that DEW has taken an initiative to build such a modern vessel so quickly after being inducted by the major Coast Guard forces and navies of the world. Our shipbuilding quality and expertise is truly world class!
     
    Last edited: May 12, 2015
  3. Bilal9

    Bilal9 ELITE MEMBER

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    To show how versatile these Damen Stan boats are, here is one enlarged version, the Armidale Class of Australia built by famed Austal yard in Fremantle. Notice the variation of the front cabin and living quarters good for a dozen crew members. Unlike the US Sentinel Class, the hull and superstructure in this one is also made of marine grade Aluminium. In the US ones,the hull is steel. I believe the Bangladesh boats will follow the US example. Armament on Australian and US boats consists of a 25 mm main gun (auto-cannon) and two 12.7 mm heavy machine guns, all navalized and deck stabilized. For customs, EEZ protection and fisheries patrol this is more than sufficient, with sufficient I, E, F band radars for threat identification. All boats, including Bangladeshi examples (except Australian) have stern launch ramps for RHIB boats for boarding rogue vessels. Australian RHIBs are launched by foldable cranes as seen below. Bangladesh already has a very large fleet of RHIB boats (US metal shark and Defender boats) used by the Navy and Coast Guard.

    Notice the stabilizing ribs and chines on both sides as well as the small bow-thruster to turn the things around in crowded docks. The design of the Bangladeshi boats will be very similar, but scaled down to a much smaller size as shown in the first post above. There is only one engine that will be needed for our boats and living quarters will number a lot less.

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    Last edited: May 14, 2015
  4. asad71

    asad71 PROFESSIONAL

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    1.DEW was originally set up by the Brits to build small naval craft. So it has a long history in the trade.

    2. Overall BD is going great guns in shipbuilding. Some say another RMG like boom is emerging here.
     
  5. bongbang

    bongbang SENIOR MEMBER

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    BD has long histories in Ship building. Ptolemy showed in his map Chittagong as one of the finest harbors in Eastern world. Chittagong shipyards made ships for Mughal and Ottoman navies. Examples of British sailing built in Chittagong include the Betsey, Argo and Mersey.
     
  6. asad71

    asad71 PROFESSIONAL

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    The keel laying ceremony was held for two vessels - one an Inshore Patrol Vessel and another Fast Patrol Boat. The IPV is actually smaller than the FPB and is less powerfully armed.However, it seems the Coast Guard is going to be expanded in a major way to secure Bangladesh's territorial waters. This is good news because it frees BN to concentrate on naval warfare instead of law enforcement duties.
     
  7. Bilal9

    Bilal9 ELITE MEMBER

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    Indeed. The Shipyards need to actively pursue new specialized builds (like the Damen type FPB) to get experience and stay ahead. But there is plenty of local demand too - in this land of 700 rivers.
     
  8. Bilal9

    Bilal9 ELITE MEMBER

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    Here are images for the ceremony and (I believe) the prototype (the hull is entirely updated a la modern large fiberglass yachts),

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    Or is it another prototype?
     
    Last edited: May 13, 2015
  9. Arthur

    Arthur FULL MEMBER

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    It looks like a new prototype of aluminum boat to me :undecided: coast guard uses similar looking boats in their major river port stations and for harbor patrolling.

    Here is my assumption,

    FPB - similar looking to sentinel class,as USCG uses same weight class as Rapid/Fast Response Cutter.(also keep in mind the Padma class is in the same weight class of Patrol vessel.)

    IPV- Fiber glass version of aluminum Boats,they both looks same to me.

    I am totally going after looks here.Good or bad,don't know :confused:
     
  10. Bilal9

    Bilal9 ELITE MEMBER

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    [​IMG]

    [​IMG]

    The above are aluminium hull HPB's for the Coast Guard (Harbour Patrol Boat). These have long range search radars and are a quite different prototype than the IPV in my last post. The IPV is much smaller than the HPB. DEW has not published specs for the IPV's yet but the image shows it to be fairly well armed for a CG boat.

    The HPB specs are,

    Class: Harbour Patrol Boat (Bangladesh Coast Guard)
    Units: CGS Boleshwar (pennant HPB 4903) and CGS Tentulia (HPB 4904)
    Inducted on: 15 March, 2015
    Builder: Dockyard and Engineering Works Limited (Bangladesh Navy)
    Displacement: 25-tonnes
    Length: 17.47 m,
    Beam: 5.51 m
    Draft:1.4 m
    Composition: Marine-grade aluminium alloy
    Classification: Bureau Veritas (BV)

    Motive Power: Two 800 bhp Volvo Penta D13-800 engines
    Propellers: Fixed pitch
    Gearbox: ZF 311A
    Top speed: 25 kt
    Range: 350 nautical miles at a cruising speed of 20 kt


    BTW Only in an enlightened Muslim country like ours could we name a new ship CGS Boleshwar (apparently a Hindu name of a river). This type of neutrality does not exist anywhere in the SAARC countries except maybe Sri Lanka. I am truly proud of this. In neighboring countries they are busy changing Muslim named cities to Hindu names. For what reason is better unsaid.
     
    Last edited: May 14, 2015