For a long time, we have delivered various types of winches in sea water resistant aluminium for cranes and rigs.
Our largest product group is mantel winches, but we also deliver boom lifting and boom swing winches.
All winches in this class are equipped with a negative break.
I.e. the winch drum is locked on the break, with or without a load, till the winch is activated.
A typical lifting crane is in the range of 1-10 tons, but this is no limitation.
Certification as needed, DnV, SOLAS, etc.
All lifting winches are tested with overload according to relevant requirements.