Ok Floating:<p>The plow rest on the ground and if the ground is frozen will raise and lower with the contour of the ground. If the ground isn't frozen it will dig up the ground.<p>Floating posistion is achieved by allowing the lift cylinder to have an open valve. So as the ground drops, and the plow lowers the cylinder is able to contract further. This is because the chain pulls down on the cylinder (just like when you lower the plow. So when the plow is in the float posistion, which it is every time you drop the blade (unless you raise the plow just alittle bit, this cancles the float setting) you are in the float posistion. This is why you can plow slights dips in the lots with out leaving snow on the pavement. This is also why the plow manufactures say to allow the lift cylinder to be exposed about 2" even when the plow is on flat level ground. Yes the plow is in constant contact with the ground.<p>Hope this helps.<p>Geoff