Yeah, who rated it? The 25-year-old college grad surfer?
From their website:
“Rated to depths of 6000m, the BMS set the world record for coring at depth (5815m) in 2006.”
Of course this is a robotic drill rig and doesn’t need to have anybody on board. Most of it is just open machinery, but I suppose housing the electronic controls at those depths took some engineering.