It all began offshore. In 1975, Liebherr delivered its first BOS crane, the B10 / 17 EX, for installation on the Floating Production, Storage and Offloading Unit Princess Aweni. Since then, the BOS series has undergone continuous development, introducing new design features and operational capabilities tailored to the evolving demands of offshore environments. This includes the evolution of the Litronic control system, which progressed from early card-based setups to fully enclosed shock- and water-resistant units, and now to the latest generation offering higher computing power, expanded functionality, and multiple configuration options. Today, Liebherr celebrates 50 years of BOS cranes, combining robust design with decades of operational experience.
Scalable strength across a diverse crane range
The BOS series spans a wide range of models, from the compact BOS 2600 all the way up to the heavy-lift BOS 35000 and BOS 45000. This diversity allows operators to select the ideal crane for their specific requirements, whether for routine supply operations or complex installation tasks. Each model benefits from the signature design elements, including the A-frame, lattice boom structure, and integrated walkways that ensure easy access to all service points. The boom design enables large outreaches with precise load handling, while the A-frame supports smooth boom luffing and integrates essential service features. Auxiliary hoists provide fast, efficient handling for everyday lifts and lighter loads. Boom walkways improve accessibility for inspections, maintenance, and routine checks.
At the upper end of the range, the BOS 35000 and BOS 45000 are engineered to tackle the most demanding offshore applications. With a lifting capacity of up to 1,200 tonnes, the BOS 35000 is purpose-built for offshore wind-farm installation and the transport of large-scale oil and gas infrastructure. The BOS 45000 pushes these boundaries even further, offering up to 1,400 tonnes of lifting power and an outreach exceeding 100 metres. These cranes are purpose-built for large-scale installation, maintenance, and decommissioning work, combining precision, reach, and reliability in harsh marine conditions.
‘The BOS cranes are the ideal solution for servicing offshore wind farms, especially when long boom lengths are required’, says Robert Pitschmann, Global Application Manager Heavy Lift Offshore and Ship Cranes. ‘With their proven design and adaptability, they have remained at the forefront of offshore lifting technology for 50 years. That legacy continues to drive performance in today’s most demanding environments.’
Global reach, proven reliability
From its debut in 1975, the BOS series has grown into a cornerstone of Liebherr’s offshore crane portfolio. Initially produced at the Liebherr site in Nenzing, Austria, the BOS cranes quickly gained recognition for their reliability and adaptability. From 2005 onward, all BOS cranes and other maritime crane types of Liebherr have been manufactured at the company’s site in Rostock, Germany, which underlines the site’s position as a leading centre for maritime crane technology. To date, 502 BOS cranes have been manufactured and deployed across the globe. The United Kingdom, Brazil and Norway represent some of the largest markets, a testament to the crane’s continued relevance in diverse offshore environments.
While the offshore industry increasingly leans towards low-maintenance solutions like the Ram luffing crane series, the BOS crane remains a vital option, especially in applications requiring long boom lengths. Its unique lattice boom geometry and overall structural design help reduce vertical movement, ensuring smoother handling and greater stability during operation.
A major design evolution came in 2005, when the BOS series adopted the modern configuration that remains the industry standard: a clear separation between the distinctive A-frame and the machinery house, replacing the earlier design where the slewing platform featured an integrated drive system and a top-mounted A-frame. This redesign enhanced serviceability while also creating a solid foundation for future technological integration.
Integrated intelligence for demanding lifts
Since 2005, the BOS series has been equipped with Liebherr’s in-house developed Litronic crane control system, a key component in delivering precise and efficient offshore operation. Acting as the interface between crane and operator, Litronic enables real-time diagnostics and optimised lifting performance. The modular architecture also allows for tailored functionality, making it an ideal fit for the diverse demands placed on BOS cranes worldwide.
‘The BOS series has proven itself over decades of offshore use. Its adaptability, solid engineering, and integration of systems like Litronic make it a reliable choice for operators worldwide. We’ve refined the concept over the years, but the core strengths have remained, and that’s what continues to make it successful,’ explains Stefan Schneider, Global Application Manager for General Purpose Offshore Cranes.
Alongside the BOS series, Liebherr’s offshore portfolio includes specialised solutions like the TCC 14000, a highly flexible crane architecture mounted on a mobile undercarriage. With lifting capacities of up to 600 tonnes and hook heights reaching 100 metres, the TCC 14000 is designed for rapid mobilisation and precise positioning. Its specific design combines the high lifting capacity of a BOS offshore crane with the unique mobility of a harbour crane.
Looking ahead, the BOS series continues to evolve in response to changing offshore requirements. Electrification remains a key focus. As the offshore industry advances, Liebherr remains committed to delivering reliable, forward-looking crane solutions built on five decades of experience and a clear vision for the future.
