Straight Boom Rope Luffing
![line-marine-cranes line-marine-cranes](http://www.tms.nl/wp-content/uploads/2019/11/line-marine-cranes.png)
The straight boom cylinder luffing crane has a lattice or 'closed box' luffing. Luffing is done by a winch. A second winch is used for lifting. Slewing is done by a slewing gearbox which drives the slewing ring bearing. The crane can use the power of the vessel, but if required, an integrated powerpack can also be supplied.