Two mining technologies are deployed to suite different ground conditions:
- the airlift-drill technology, which uses a 6.8 meter in diameter drill bit working in overlapping circles on the sea floor, and
- the crawler technology, which uses a 280 tonne track-mounted crawler dredging on the sea floor.
Four of the production vessels use the airlift-drill technology, whilst only one vessel (mv Mafuta) uses the crawler technology.
Mining takes place on the sea floor at water depths of up to 140 metres.