A new class of transhipment vessel has entered service to accelerate iron ore shipments from West Africa to China. On Tuesday, China's CSSC Chengxi Shipyard delivered the Wontanara, the first of five purpose-built self-unloaders ordered for the Rio Tinto-led Simandou development in Guinea, according to Splash247.
The vessel is owned by SimFer, a joint venture comprising Rio Tinto, Chalco Iron Ore Holdings, and the Guinean government. Canadian self-unloading specialist CSL is also involved in the programme. The 41,800 dwt ship measures 215 m long and 42 m wide, with a moulded depth of 14.5 m, a design draught of 7.5 m and a 29,000 cu m cargo hold.
Three Records and Rapid Discharge
Chengxi claims the Wontanara has established three world records, as reported by Splash247:
- Largest deadweight shallow-water transhipment self-unloader
- Fastest specialist self-unloader
- First vessel in its tonnage class capable of sailing in both directions (bidirectional design)
Two reversible longitudinal conveyor belts and twin C-shaped lifting systems give a combined discharge rate of 12,000 tonnes per hour, allowing a full cargo to be unloaded in less than three-and-a-half hours. Five azimuth thrusters enhance manoeuvrability, crucial for operating between Simandou's shallow-water port facilities and deep-draft bulk carriers waiting offshore.
Operational Impact and Fleet Rollout
The Wontanara is the first of a five-vessel series. The second and third units were launched on May 6 and June 30 respectively and are scheduled for delivery during the first half of next year, Splash247 stated. Once all five vessels are in service, Chengxi said they will be capable of transferring enough ore to load a 200,000 dwt bulk carrier within 24 hours, substantially reducing anchorage waiting times and supporting SimFer's production ramp-up.
| Feature | Wontanara Specification |
|---|---|
| Deadweight | 41,800 dwt |
| Length | 215 m |
| Beam | 42 m |
| Draught | 7.5 m |
| Cargo hold | 29,000 cu m |
| Discharge rate | 12,000 t/h |
| Full-cargo unloading time | < 3.5 hours |
| Vessels in series | 5 |
Serving a Strategic Source of Iron Ore
The ships will serve Simandou blocks 3 and 4, where Rio Tinto is the majority shareholder and managing partner. The Guinean development is expected to become one of the world's most important new sources of high-grade iron ore, according to Splash247. The new vessel type will be critical to efficiently moving ore from the shallow-water terminals to large bulk carriers bound for China, avoiding bottlenecks that often plague West African export logistics.
Watch List
- Delivery schedule for remaining four vessels – next unit expected in first half of 2027.
- Simandou production ramp-up – as five-ship fleet becomes fully operational.
- Impact on Capesize/VLOC utilisation – faster loading cycles could lower waiting times at anchorages, improving fleet productivity.
- Global iron ore trade patterns – combined output from Simandou may shift market share among major suppliers.
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