De Beers' new flagship vessel Benguela Gem has begun operations ahead of schedule, lifting Debmarine Namibia's annual production by 500,000 carats and triggering renewed demand for mooring, dredge, and recovery equipment across SADC operations.

Energy & Mining 30 July 2026 • 4 min read

De Beers' custom-built Benguela Gem, valued at more than $420 million, will increase Debmarine Namibia's annual production by 45 percent, adding 500,000 additional carats of high-value diamonds. The milestone marks the latest chapter in offshore diamond mining's evolution offshore Namibia, where seabed extraction now accounts for two-thirds of the country's total production, and mooring, recovery, and dredging rope demand is climbing with each new vessel deployment.

Benguela Gem enters service ahead of timeline

The ship, named the Benguela Gem, began operations this year, ahead of schedule. Debmarine Namibia is a subsidiary of Namdeb Holdings and is a 50/50 joint venture between De Beers Group and the Government of the Republic of Namibia. De Beers recently debuted its new diamond recovery vessel at an inauguration ceremony in Namibia. The vessel represents a significant capital commitment to offshore capacity and underscores continued confidence in Namibia's offshore diamond fields, which remain among the world's richest seabed deposits. The vessel will also create 160 jobs for Namibians.

Subsea crawling technology and mooring shifts

The vessel will use subsea crawling extraction techniques to retrieve diamonds from depths of between 90 and 150 metres off the coast of Namibia. After finding the most lucrative spots by scanning the seabed using unmanned and remotely operated vehicles, a horizontal crawler is attached to a vessel to dredge the seabed for diamonds. Up to 60 tonnes of sediment are lifted up to the vessel through a giant pipe each hour. The Benguela Gem represents a generational shift away from traditional mooring systems. Historically, vessels have used a four-point mooring spread, with stability but requiring a day to lift, meaning operators lose a production day every seven to eight days. The new flagship replaces anchor-dependent mooring with dynamic positioning technology, eliminating repeated winch cycles and freeing operational days for extraction work.

H1 2026 production headwinds and supply chain signals

Despite the Benguela Gem launch, Namibia's diamond production fell 7% to 1.09 million carats during the first half of 2026, as lower offshore output at Debmarine Namibia offset stronger production from Namdeb's land operations. Anglo American attributed the weaker performance to planned maintenance at Debmarine Namibia's Mafuta mining vessel and the retirement of the Coral Sea vessel, although the impact was partly offset by higher-grade mining at Namdeb. The H1 maintenance cycle signals a typical offshore procurement pattern: major platform servicing cycles occur during the southern African off-season (roughly June to August), creating concentrated demand for specialised rope, rigging, winch systems, and dredge recovery equipment. Industrial suppliers must anticipate these cyclical tenders months in advance.

Fleet composition and economic weight

Debmarine Namibia owns, operates and maintains seven marine diamond recovery vessels, namely: mv Debmar Atlantic, mv Debmar Pacific, mv Grand Banks, mv !Gariep, mv Mafuta and mv Benguela Gem. The seventh member of the Debmarine Namibia fleet, mv SS Nujoma is a diamond exploration and sampling vessel. Diamond recovery by Debmarine Namibia is the single biggest contributor to the country's economy, with the partnership contributing more than 10 billion Namibian dollars (about $626 million) in revenue to Namibia annually. That scale justifies centralised procurement: each vessel requires dedicated spare stocks of dredge rope, mooring lines, dynamic positioning thrusters, and subsea connectors. The Benguela Gem addition is not a one-time order; it triggers ongoing spares logistics from Walvis Bay and requires qualified handlers for maintenance cycles.

Competitive and environmental pressures

The coast of Namibia is the richest known source of marine diamond deposits which account for approximately 64% of Namibia's total diamond production. Offshore deposits are estimated to be 80 million carats. Mining takes place on the ocean floor at water depths ranging from 70 to 140 meters. This geological advantage is absolute, but global competition for deepwater mining licences is intensifying. Kenzoll Capital, a Dutch private equity firm, recently acquired the Adamastor offshore diamond mining vessel, and there are reports that this vessel will commence diamond mining in the Namibian EEZ. New entrants to the Namibian offshore corridor will require certified dredge operators, rope specialists, and dynamic positioning engineers from the SADC supply base. Environmental compliance is tightening: Debmarine Namibia has a 20-year environmental track record of shallow-water, least impact diamond recovery operations. This durability requirement means rope and rigging suppliers must document materials for deepwater tensile performance, saltwater corrosion resistance, and third-party certification (ABS, DNV, Lloyd's).

About the Author
	Andre Klynsmith Co-Shareholder · Technology & Operations Andre's expertise spans technology, e-commerce, AI integration, and industrial procurement systems, driving Marine Ropes' digital transformation across Southern Africa. salesdesk@marine-ropes.com | marine-ropes.com