At 1 a.m., the glider, powered by hydraulics from a CamelBak water pouch squeezed by Reine, began to rise and fall at his command. Invented in the 1960s, ocean gliders have become a linchpin for oceanographic data collection. These days, they’ve been crucial for filling important data gaps at ocean depths where stationary observation moorings can’t reach. There was a time when the building blocks of the WHOI glider were built solely in-house. With fewer gliders in the water, he says the oceanographic community could be missing out on an opportunity to make ocean observations a more global effort.