Board Offshore Crane (BOS) 
The offshore crane series includes wire-luffing and ram-luffing cranes. The cranes are available in various sizes and can be optimised for specific customer requirements.
The BOS crane is a conventional slew bearing type rope luffing crane. This type of crane is available in different sizes and lifting capacities of up to 400 metric tonnes. The maximum boom length for this crane is 100 metres which is especially required for offshore wind park installation.
The crane prime mover is either electric-hydraulic or diesel-hydraulic. EX proof systems are available. The hydraulic system is of a closed type technology with individual circuits for each crane function.
Rope luffing cranes are available with metallic or non-metallic slew bearings.
Compact Board Offshore Crane (CBO)
The lifting capacity is available from 25 up to 150 metric tonnes. The CBO crane is a weight optimised crane system and suitable for both floating and fixed applications offshore.
This crane model is only available with a electric hydraulic power pack.
Mast Type Crane (MTC)
The Mast Type Crane is based on the Kingpost principle and has got a non-metallic slew bearing. The crane prime mover is either electric-hydraulic or diesel-hydraulic. EX proof systems are available. The hydraulic system is of a closed type technology with individual circuits for each crane function.
Ram Luffing Crane (RL)
The RL offshore crane is a compact solution for manned and unmanned installations, FPSO, FSU, Jack Up, Pipe layer, Buoy handler and multipurpose applications. The luffing system is operated by one(1) or two(2) hydraulic cylinder(s).
The crane prime mover is either electric-hydraulic or diesel-hydraulic. EX proof systems are available.
Special Application Crane (SA)
The SA cranes are available for applications like buoy handling and/or pipe handling.
The crane prime mover is either electric-hydraulic or diesel-hydraulic. EX proof systems are available. The hydraulic system is of a closed type technology with individual circuits
for each crane function.
source - www.liebherr.com
