OUCO 5T20M Explosion-Proof Marine Crane Deployed for Greek Offshore Fleet

The Operational Challenge

Offshore tug/supply ships must handle a striking variety of cargo under unpredictable sea states—from lightweight pallets of provisions to multi-ton machinery and marine tooling. In a single shift, a deck crew may need to offload supplies across a 20-meter reach or perform challenging offshore lifts alongside the vessel. Traditional marine cranes often struggle to balance heavy lifting capacity with an extended reach, especially when dealing with dynamic offshore wave motions and hazardous gas environments that risk operational safety and equipment stability.

Enter the OUCO Knuckle Boom Crane

The custom-engineered OUCO 5T20M Knuckle Boom Marine Crane redefines versatile deck operations. Fully certified by ABS, this articulated crane is meticulously designed for harsh marine environments, boasting a working radius of 3.5 to 20 meters. To ensure uncompromised safety during hazardous offshore transfers, the crane body is installed in a safe zone, while the boom features specialized Zone 1 explosion-proof engineering. Dual-control functionality via an integrated operator cabin and a wireless remote controller guarantees precise, safe handling from the most optimal vantage point.

Real-World Impact: Turkey Tug/Supply Fleet

When a Turkey shipping operator deployed this customized 5T20M crane on their tug/supply vessel, it immediately streamlined their marine logistics through several key advantages:

• Dual-Lift Offshore Capability: Optimized for variable sea states, the crane delivers an inboard Safe Working Load (SWL) of 5T for standard deck operations and an outboard offshore lift capacity of 1.5T under a significant wave height of Hsig = 2.5m (working wind speed of 10.3 m/s; parking wind speed of 51.5 m/s).

• High-Efficiency Performance: Driven by a powerful 55KW electric motor (Y250M-4-H, AC480V/60HZ) with Class F protection, the system achieves a hoisting speed of ~12m/min, a hoisting height of 30m, and a continuous 360° slewing speed of ~0.6 r/min.

• Articulated Maneuverability: With first and second luffing times clocked at an efficient ~90 seconds, the knuckle boom design allows the crane to fold compactly when not in use. This preserves valuable deck real estate and enhances vessel stability under extreme lists (Heel≤5°, Trim ≤2°).

• Climate Resilience: Operating seamlessly in ambient temperatures ranging from -10°C to +45°C, the crane maintains consistent hydraulic and mechanical stability during grueling S1 duty cycles.

Why Optimized Marine Engineering Matters

For fleet operators evaluating crane investments, the OUCO 5T20M configuration translates directly to a safer, more adaptable vessel. By incorporating Zone 1 boom explosion proofing, flexible cabin/remote controls, and strict compliance with ABS standards, this crane eliminates the need for compromise between heavy onshore staging and tricky outboard marine deployment. The Turkey client’s field experience confirms that this tailored approach drastically reduces capital expenditure and maintenance overhead while maximizing offshore operational safety.