anchor: well you don't have a choice of where you're going so when you get ready to come down you have to you know you it's more or less like letting the air out he can land more or less where he wants to it's just that there's no like if he wanted to go one place he would have to know which way the wind is blowing
positive: You have little control of where you get drifted to.
negative: You can pinpoint the exact spot you want to go to.