Deep Divers are very simillar to their collegues from Sky Divers, however, specialization of this team is based on deployment by ship or submarine. Most their home Base is Base 3 'UnderWater'.
After the ambush of X-Corp. some of remaining members were hiding in emergency bunker.
Before they were evacuated, Sky divers were set in to find them. But after Sky Divers were deployed at the base, connection was lost and no remnants of Sky Divers nor Deep Divers were found.

Their equppment was:
*2DWC-Under water combat pistols
*Robotic Armor Core with life support system
*Oxygen Tank with Recycler
*Mounted sensors