The course I play at regularly has a hole where you shoot at a basket on a peninsula and there is of course water in play. I feel like I understand the surrounded by water rule but I am not sure about this situation. There are tall weeds all around the edge of the lake and it is very swampy. It is very possible to have your disc land on weeds and have the weeds (at their base) totally in the water or have the disc partially in the water but held up by the weeds. this is swampy water where you might sink up to your ankles in muddy water. What would be the test to determine OB in this type of area?