A launching and landing guide device is arranged in a floating side unit having a winch and a sail for unwinding and winding the tether. The launching and landing guide device includes a position setting unit that sets a position at which the tether is unwound or unwound, and a launching and landing guide unit that is capable of fixing the kite when the tether is wound and guides the kite and the tether when the tether is unwound or unwound.

In the sea route plan generating system, a sea route plan generating unit that generates a sea route plan for sailing the power generation floating body that performs wind power generation using a kite while sailing at sea, at a predetermined sailing angle based on the wind conditions and a tidal current determining unit that determines whether or not there is an opposing tidal current opposed to the wind direction based on the wind conditions are provided for the power generation floating body that generates wind power using kite while sailing on the sea. When it is determined that there is an opposite tidal current, the sea route plan generating unit generates the sea route plan such that the power generation floating body proceeds at the sailing angle at which the power generation efficiency increases in the sea area of the opposite tidal current.

Method for landing a kite system (23), in which the kite system (23) comprises a kite (14) and a control pod (25). The kite (14) is held on the control pod (25) via a line system (24). The control pod (25) is held during normal operation of the kite system (23) via a tether (15) on a ground-based attachment point (16, 44). A sail surface of the kite (14) is spanned by a first kite part (40) and a second kite part (41). A connection (36) which exists in the sail surface between the first kite part (40) and the second kite part (41) is separated such that the kite (14) assumes a different aerodynamic state and falls to the ground with the control pod (25). The invention also relates to a kite system.