PROBLEM TO BE SOLVED: To make an air vehicle that generates a downward flow during flight approach and / or land on a floating body affected by the downward flow. SOLUTION: A control device 200 for approaching and / or accreting a flying object 10 that generates a downward flow DF during flight to a floating body 30 affected by the downward flow DF, and the floating body 30 receives the downward flow DF. A flight control unit that flies the flying object 10 according to the landing path FR, which is a path for flying toward the moving destination of the floating body 30 that moves under the influence of the downward flow DF, which is determined based on the motion characteristics of the floating body 30 in the case. 187 is provided. [Selection diagram] Fig. 4
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