A system including a heavier-than-air vehicle (HTA), a lighter-than-air vehicle (LTA), and a tether is disclosed. The tether is coupled between the HTA and the LTA such that the LTA supports the HTA. The system may be further configured to suit the needs of the particular application. For example, the system may be configured to be controllable from a remote location or capable of autonomous operations. The system may also be configured such that the HTA comprises a mission payload and communications equipment. In an exemplary embodiment of the invention, the LTA is configured to provide lift for the system and the HTA is configured to provide station-keeping propulsion, the advantage being reduced fuel consumption and increased mission endurance.