Re:Vessel Finder
by 082349872349872 on Tuesday July 14, 2020 @05:12AM
(#23829915)
The two-layer feature of the Strait of Gibraltar:
https://books.google.ch/books?id=nUtLDwAAQBAJ&pg=PA46&lpg=PA...
meant that submarines used to be able to pass in both directions with engines off.
Still physically possible, but no longer worthwhile: https://news.ycombinator.com/item?id=23548220
There is also: https://skibstrafik.dk/ which is pretty good.
You can even get a picture (if available) and more information about a ship by clicking on it.
http://map.openseamap.org/?zoom=9&lat=35.98913&lon=-5.41849&...