Google Earth,Lake Michigan object

[Electro32]

Hi, I was researching a flight site on Chicago's lake front (lake Michigan ) and found an odject on the water (in Google earth) but I can't find any information on it to know what that is (light house?) Just in case anyone knows what this is please share, this are the coordinates : 41.786121,-87.531184 . Thanks.

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[Vzr1]

Buoy

 

[Marnat3]

Or Gurl

 

[dmagnus]

It's a navigational hazard: NOAA chart:
Chart 14928