Once you know the date the crane arrive at the port to take pictures as evidence in case of a fault is found outside of the crane as evidence to negotiate with the factory.
When the crane arrives at port to be taken as evidence in the event that a defect is found outside of the crane as evidence in negotiations with the factory.
When you know the crane will arrive at to take as evidence in case of defect is found outside of the crane for evidence in negotiations with the factory.