Reports on findings on ocean circulation and what they tell us about the state of oceans during the Last Glacial Maximum (LGM). The North Atlantic Deep Water (NADW) ocean current having considerable consequences for the climate; Evidence of some form of NADW conveyor operating during the LGM; The surprising discovery that the protactinium isotope Pa is missing in the Atlantic Ocean; Surmising where Pa is conveyed by NADW convection.