ED (if compared to sailing ) is like constantly staring at a GPS, in non tidal waters no further than 2 miles off shore in a light breeze but still not hoisting the sails because its "gusty" with a qualified skipper holding your hand just in case.
like the bar sailor, talking good tales of sailing but wont go out in a force 5
Traditional navigation with a good old pencil and log book, crossing oceans, and force 8 and above are another world, there is currently a race across the Atlantic where 1 boat sunk, 1 dismasted and numerous abandoned
21 boats started only 7 are still racing...
The ocean is truly a dangerous place that requires dedication skill and endurance - ED pretty much holds your hand all the way both navigationally and with regards to safely returning.
a visual representation could be the picture below, and ask yourself a) where are you, b) what course should I steer to reach land (ED tells you the answer by just opening the galaxy map - the below without GPS is a little more complicated

)