Do ferries and
barges just wander all over the LIS? No, they operate in lanes that can easily
be avoided with GPS.

Totally incorrect as any real sailor could tell you. I guess by your resoning
there is no reason for ferries and barges to have radar or even keep a wath,
since they are so predictable.

Yes, they stay in deep channel's and in the last 8 years I have yet to see a
ferry or tug off it's lane.
You're a joke and a troll. You clearly don't sail. You already got busted on
the "fog" comment. LIS has very little in the way of visibility issues. If your
vision is failing stay home.

RB