Patent ID: 7398741
Filing Date: 2008-07-15
Classification: A63H,B63B,B63H,G01C,G05D,Y02A

Abstract:
1. A remote control unmanned boat comprising: a propelling power source for generating a propelling power, a steering device for freely varying the direction of travel, a first transmit-receive antenna for receiving a signal transmitted by radio by a remote control device, a first controller for controlling said propelling power source and said steering device based on said signal received by said first transmit-receive antenna, a memory device for memorizing an initial position set in advance, a GPS antenna for receiving an electric wave transmitted from an artificial satellite, said first controller being adapted to calculate the present position based on the electric wave received by said GPS antenna and, when stated conditions are satisfied said first transmit-receive antenna becomes temporarily disabled so that it becomes temporarily incapable of receiving said signal, to initiate automatic control of said propelling power source and said steering device so as to be regressed to the initial position based on said present position and said initial position, and said first controller, when said first transmit-receive antenna becomes capable of receiving said received signal during said automatic control, terminates said automatic control and resumes control based on the signal from said remote control device, a surveying device for surveying the states of water body and water bottom, wherein said first transmit-receive antenna causes information obtained from the survey concerning the states of water body and water bottom surveyed by said surveying device to be transmitted by a specific electric wave to said remote control steering device,