Good day,
This is a video detailing TOKYO KEIKEI EC-9000 Type ECDIS.
This is not a type specific explanation, but a general explanation on the use of ECDIS.
Since the video is long, it has been split into parts, and by the time you complete all the videos, you will be able to work on any type of ECDIS, as only the buttons change, while the functions remains the same.
Hope you will find this video and the following videos useful for your career at sea
Regards ♥️