Virtually everyone is, by now, familiar with the concept of electronic navigation, also called eNavigation or eNav. The problem is that the term means different things to different people. Historically, it started with radio beacons. Radar, loran, and GPS have been added over time. Now we have AIS and electronic charting. Most mariners view this as an increasingly sophisticated set of tools installed on the ship to improve the ability to avoid collisions, groundings, and related casualties. That is only part of the story.