A group of Aids to Navigation lantern is made to flash simultaneously.
Lights which only lit steadily up to now have changed to flashing, which clearly designates the area and are easier to see.
The electric wave reception method of the GPS satellite is adopted synchronously.
In the state that a synchronous blinking is not applied, it blinks according to the cycle and the timing of individual sealing coat Ito, and it becomes asunder movement.
All sealing coat Ito blinks regularly by installing the synchronous blinking controller in individual sealing coat Ito, and setting the cycle and timing (delay time).