The invention relates to a device and system for the take-off and landing of unmanned aerial vehicles or the berthing and unberthing of unmanned vessels, using visual analysis methods. The solution consists of a design for a platform containing a geometric figure having unusual characteristics. The image of the platform is obtained using a digital camera located on board the unmanned vehicle and connected to a device provided with image-processing means, allowing the orientation and relative position of the vehicle and platform to be obtained using the figure claimed.