A variable-configuration, dual-navigation-state, long-voyage unmanned marine vehicle driven by a natural environment fluid. The unmanned marine vehicle has a surface navigation mode, a navigation switching mode and an underwater navigation mode, and comprises a wind energy collection unit, a buoyancy regulation unit, a wing keel (7), a linkage unit (10) and a photovoltaic power generation unit. The unmanned marine vehicle is energy-autonomous by means of using sea surface wind flow, underwater water flow and sunlight of the natural environment, and has a long-distance navigation ability in both the surface navigation state and the underwater navigation state.
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