Watercraft positional information managing system, server, and watercraft positional information managing method

A server configured or programmed to:

• receive positional information of a watercraft and data related to an engine of the watercraft from the watercraft at predetermined intervals of time;
• determine whether or not the positional information of the watercraft is genuine based on the data related to the engine in a predetermined period of time;
• and
• when it is determined that the positional information of the watercraft is not genuine, record the watercraft whose positional information is not genuine, or transmit a warning signal;
• wherein
• the data related to the engine includes an operating time of the engine, a fuel flow rate, a speed of rotation of the engine, or a throttle opening degree.

A watercraft positional information managing method comprising:

• outputting data related to an engine of a watercraft to a communicator of the watercraft by a controller configured or programmed to control the engine;
• detecting positional information of the watercraft;
• transmitting the detected positional information of the watercraft and the data related to the engine from the communicator to a server at predetermined intervals of time;
• receiving the positional information of the watercraft and the data related to the engine with the server;
• determining whether or not the positional information of the watercraft is genuine with the server based on the data related to the engine in a predetermined period of time;
• and
• when it is determined that the positional information of the watercraft is not genuine, recording the watercraft whose positional information is not genuine, or transmitting a warning signal to the communicator of the watercraft;
• wherein
• the data related to the engine includes an operating time of the engine, a fuel flow rate, a speed of rotation of the engine, or a throttle opening degree.