Underwater gliders move efficiently through the water-column by exploiting their ability to change their weight in water. As a frequent communications and shallow dives, which imply frequent changes in buoyancy, is an increase in power consumption and therefore a reduction in mission length. Currently the operational endurance of the gliders varies from 3 to 4 weeks far the shallow SLOCUM glider (ma. depth 5 ZoOm) to several months for the deeper diving gliders Seoglider (ma. depth