Welcome in Cruiser's Forum
I'm not sure if this forum is the best place to learn about ECDIS. You might try official documents written by the International Maritime Organization (IMO).
I suggest that you look at the catalogue http://www.imo.org/Publications/Docu...withprices.pdf
You might try this:
PERFORMANCE STANDARDS FOR SHIPBORNE RADIOCOMMUNICATIONS AND NAVIGATIONAL EQUIPMENT
The new consolidated edition of Performance Standards for Shipborne Radiocommunications and Navigational Equipment
incorporates all amendments adopted up to November 2007, including:
• Electronic Chart Display and Information Systems (ECDIS);
IC978E ISBN 978-92-801-42341
OPERATIONAL USE OF ELECTRONIC CHART DISPLAY AND INFORMATION SYSTEMS (ECDIS) (Model course 1.27) (2000 Edition)
This course is intended for officers in charge of a navigational watch on ships equipped with ECDIS.
T127E ISBN 978-92-801-61120