Currents and depth charts a possibility?

[Delareon]

OLC Gui has an fantastic tool for that reasons.
A little dragable item where u can at least figure out if the water is 100 meters or just 85 meters. Not as accurate as a real depth chart could be, but the maps of that time wherent that accurately anyways.
MaGui has also a tool but that damned thing is useless at night because of the lights at the Nav screen.