Quote:
Originally Posted by sunchaser
Silly as this may sound, how often do land masses move?
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Usually, not often. But a river delta or sand bar often moves a lot.
Those are known hazards. But a lot of changes include newly reported rocks. How do you think they come to be "reported?" Do YOU want to be the one who reports them?
Then there are the buoys which are changed, moved or discontinued. Lights and fog horns are changing all the time as new technologies are deployed.
Fish farms are established, offshore wind farms and gas offloading stations are built. Bridges are worked on and rebuilt. Harbors are dredged.
Just look at all the changes on any weekly LNM. Are you going to remember them all? It's so much simpler to have an update chart (paper or electronic.)