Drone aerial shot towards a large container cargo ship being loaded by gantry cranes with the shipping container yard in foreground

port crane port harbour gantry crane transnet logistics container ship msc container empty container handler export durban straddle carrier cargo freight bay aerial economy marine loading arm import ship yard crane industry shiploaders hoppers south africa transportation storage 4k bulk grabs forklift drone delivering twist lock mearsk stack chiksan arm empty spreader train