500 GT Ton or more oicnw operational level. The checklist says I need terrestrial, coastal and electronic navigation . I took a class that was coastal and t nav combined but wasn’t anything about electronic nav, no assessments for this . I did however get the assessments signed off at work. So do I need to take a electronic nav course still ? Also I do have ECDIS, ARPA and GMDSS. Does that suffice ?