the tc line of off-shore cranes was developed and produced by italgru for small off-shore rigs. they have a cased boom, rather than a lattice boom like the t...s line, and a capacity ranging from 2 to 10 t with a slewing ......the tc line of off-shore cranes was developed and produced by italgru for small off-shore rigs. they have a cased boom, rather than a lattice boom like the t...s line, and a capacity ranging from 2 to 10 t with a slewing radius from 5 to 12 m. the tc line operates with either an electric-hydraulic system or a dieselhydraulic system depending on the needs or requirements of the user. the tc series equipment is operated and controlled either from fixed positions or by radio signals, in both cases with perfect visibility of the operating area during load handling.