Triplex Shark Jaw
The Triplex Shark Jaw is a robust, heavy-duty mooring clamp engineered for the most demanding marine operations. Specifically designed for tugs, anchor-handling vessels, offshore supply ships, and platform supply vessels (PSVs) , this unit provides a secure and reliable grip on both anchor chains (40–114mm) and steel wire ropes (15–100mm) .
Featuring a unique dual retractable claw design, the Shark Jaw allows for adaptable load management, ensuring balanced force distribution when securing or towing. Its critical failsafe quick-release functionality enables emergency disengagement under load, prioritizing crew and vessel safety in dynamic offshore conditions. When not in use, the jaws recess flush with the deck, eliminating tripping hazards and maintaining a clear working area.
Available with either electric or hydraulic drive (operating at 18MPa system pressure) and capable of remote operation from the wheelhouse or local control panel, the Triplex Shark Jaw combines rugged strength with intelligent control for modern anchor handling and towing operations.
Key Features & Benefits
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✅ Dual-Action Retractable Claws: Independent claw retraction ensures balanced force distribution and a secure grip on both chain and wire, reducing point loads.
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✅ Flush Deck Integration: Jaws recess completely to deck level when not in use, providing a safe, obstruction-free working area and preventing damage to equipment.
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✅ Versatile Drive Options: Choose between electric or hydraulic power (22 kW standard) to match your vessel’s existing systems. Hydraulic units operate at 18 MPa.
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✅ Failsafe Quick-Release: A critical safety feature allowing for immediate emergency disengagement of the tow line or anchor chain under load, preventing capsize or damage.
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✅ Remote & Local Control: Operate the unit safely from the wheelhouse or via a local control panel for precise positioning during operations.
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✅ Wide Grip Range: Capable of securely holding anchor chains from Ø40mm to 114mm (Grade R3 to R5) and wire ropes from Ø15mm to 100mm.
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✅ High Safe Working Load (SWL): Available in models with holding capacities ranging from 80 to 700 tons to suit a wide variety of vessel sizes and towing requirements.
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✅ Corrosion-Resistant Finish: Polished, burr-free surfaces and customizable color options (red, blue, gray) ensure long-lasting performance and visibility.
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✅ Global Certification: Manufactured to meet the requirements of all major classification societies, including CCS, ABS, BV, GL, DNV, LR, and RINA.
Technical Specifications
| Parameter | Specification |
|---|---|
| Safe Working Load (SWL) | 80 – 700 Tons (Model Dependent) |
| Drive System | 22 kW Electric Motor or Hydraulic Drive (18 MPa) |
| Anchor Chain Compatibility | Ø40 mm – 114 mm (Grades R3, R4, R5) |
| Steel Wire Rope Compatibility | Ø15 mm – 100 mm |
| Control | Remote (Wheelhouse) & Local Control Panel |
| Surface Finish | Polished, Burr-Free |
| Standard Colors | Red, Blue, Gray (Custom colors available) |
Certifications & Compliance
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Classification Society Approvals: CCS | ABS | BV | GL | DNV | LR | RINA
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Safety Standards:
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IMO MSC.1/Circ.1175 (Mooring Equipment Guidelines)
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ISO 7825 (Deck Machinery – General Requirements)
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Shark Jaw Model Parameters & Matching Towing Pins
Our Triplex Shark Jaw units are often integrated with a dedicated Towing Pin system for comprehensive anchor handling and towing setups. The table below provides specifications for standard models.
| Shark Jaw Model | Holding Capacity (Tons) | Recommended Towing Pin Model | Towing Pin Bollard Pull (Tons) | Power Required (kW) |
|---|---|---|---|---|
| SJ-100 | 100 | TP-100 | 40 | 15 |
| SJ-200 | 200 | TP-200 | 60 | 22 |
| SJ-300 | 300 | TP-300 | 85 | 22 |
| SJ-400 | 400 | TP-400 | 120 | 30 |
| SJ-500 | 500 | TP-500 | 150 | 30 |
| SJ-700 | 700 | TP-700 | 200 | 37 |
Frequently Asked Questions (FAQ)
1. What is a Shark Jaw and how does it differ from a standard fairlead?
A Shark Jaw (or chain stopper) is a heavy-duty deck-mounted device designed to securely hold and lock an anchor chain or wire rope during towing or anchor handling operations. Unlike a standard fairlead, which merely guides the rope, a Shark Jaw uses retractable claws to clamp down on the chain/wire, transferring the load directly to the vessel’s structure. This allows the tug or supply vessel to tow or hold position without the load being constantly applied to the winch brake, which is safer and reduces winch wear. Our Triplex Shark Jaw features dual claws for balanced load distribution.
2. What is the purpose of the “failsafe quick-release” function?
This is a critical safety feature in anchor handling and towing. If the towed vessel or anchor becomes stuck, or if a sudden severe weather event threatens to capsize the tug, the crew must be able to disconnect immediately. The failsafe quick-release allows the operator to open the Shark Jaw claws under full load, releasing the chain or wire instantly. This prevents the vessel from being pulled over (girted) or dragged into danger, protecting the crew and vessel.
3. Can the same Shark Jaw handle both anchor chain and steel wire rope?
Yes, the Triplex Shark Jaw is specifically designed to handle both. The dual retractable claw mechanism and the internal geometry of the jaw are engineered to securely grip the studs or links of anchor chains (ranging from 40mm to 114mm) as well as the outer surface of steel wire ropes (from 15mm to 100mm). This dual-function capability is essential for vessels that perform a variety of towing and anchor handling tasks.
4. What does “flush deck integration” mean and why is it important?
Flush deck integration means that when the Shark Jaw is not in use, the movable claws retract downwards so that the top surface of the unit is level with the surrounding deck. This is vital for safety and operational efficiency because it:
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Eliminates Trip Hazards: Creates a safe, clear deck for crew working in all conditions.
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Prevents Snagging: Stops mooring lines, cargo, or other equipment from catching on the jaws.
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Protects the Equipment: Shields the claws and mechanism from damage when not in operation.
5. How do I choose the correct Shark Jaw model (e.g., SJ-200 vs. SJ-500) for my vessel?
The correct model depends on the maximum Safe Working Load (SWL) your vessel is expected to handle. This is determined by factors such as the vessel’s bollard pull, the size of the anchor chains it handles, and the intended operating environment.
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SWL: The model number (e.g., SJ-200) typically indicates the holding capacity in tons. You must select a unit with an SWL that exceeds the maximum expected static and dynamic loads.
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Chain/Wire Size: Ensure the model’s compatibility range (e.g., Ø40–114mm chain) physically accommodates the largest chain or wire you will use.
Consulting with our marine engineers, who can review your vessel’s towing and anchor handling specifications, is recommended to select the optimal model.
Attention please: The description was copied from different cooperating manufacturers. The description may be different with the goods, please check with us when order.
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