Please note: there is a partially submerged obstruction as you enter or leave Middle River for the bay. A pipeline has become unanchored and is floating at an undetermined depth. This pipeline is approx 1.5 miles long and CROSSES MOST OF THE MARKED CHANNEL! It extends almost due north from the NW corner of Hart-Miller Island (from that little "finger" of land). Several boats in our racing fleet have hit this obstruction and a few sustained damage. The Army Corps of engineers has sent divers down to investigate and have marked it with warning bouys. It is marked every 500yds or so by 5 white warning bouys. The bouys on the ends and the middle are lighted, the other 2 are not. Don't confuse these bouys with the crab line limit bouys in almost the exact area. When passing north of Hart-Miller Island you must hug the northern part of the marked channel. Stay close to Flashing Red "2G". the northern most end of the pipeline is just SW of that mark. I have a 2 page .pdf file of that section of chart that shows the obstruction and lists Lat/lon coordinates for the warning bouys. I don't think I can post them on this forum, email me at brandywine@nni.com and I will send it to you. Or you can check with the CG for the latest Notice to Mariners.Toms/v Orion's Child