Battery Ss News Today

>> reporter: with these battery s s, auv can stay down for 16 hours. while there, it also measures temperature. >> with those two measurements we can calculate the speed of sound and water, important measurement when were working with sonars. >> reporter: also on board -- >> mapping vehicle, instrument that you want working every time. >> reporter: to get the mission under way, a command is sent to the auv that gets picked up by this device. >> once everything checks out and we have good navigat...