Middleback is a non-propelled self-unloading barge (SUB) that is paired with the floating-offshore transfer barge (FOTB) Spencer Gulf. The barge unloads through a single continuous hopper-shaped hold fitted with a longitudinal conveyor belt and unloading boom. This vessel currently operates on the Australian Coast.
Middleback is wholly owned and operated by CSL.
Download specs| Technical specifications | |
| Classification | LR Barge. Self-unloading. Emergency anchor equipment. Maximum 2.2 m significant wave height service extended protected water service from Whyalla. |
| Year Built | 2006 |
| Deadweight | 12,000 tonnes |
| Length Overall | 118.00 m |
| Breadth moulded | 27.00 m |
| Depth (MLD) | 7.50 m |
| Draft | 5.61 m |
| Length of Boom | 22.87 m |
| Total Hold Capacity (including hatches) | 5,426 cubic meters |
| Discharge Rate | 5,000 mt/hr (maximum) |
