FIELD: development of word ocean; submersible vehicles (buoys) moving in depth in scanning mode. SUBSTANCE: method is based on use of difference of thermal expansion of working medium volume at end points of buoy trajectory and conversion of its into change in buoyancy of opposite sign in made of heat exchange of buoy with surrounding medium. For realization of this method, use is made of devices which have ballast chambers in pressure case of buoy. Ballast chamber is connected with surrounding medium by means of controllable valve. Working medium may be liquid or rod made from solid material whose thermal expansion exceeds that of buoy case material. For reception and discharge of maneuvering ballast, use may be made of bellows or flexible envelope filled with compressed gas interacting with working medium. EFFECT: enhanced efficiency. 5 cl, 3 dwg
