You are correct sir. I learned that trick on Long Island Sound fishing for blue fish in deep water. Hook that buoy ball or they call it a bag, to your anchor line with a D-ring or snap shackle that slides. While cleated, drive to either side slightly of the anchor rode as it trails along side and behind with the ball buoy attached. As you precede and pass where the anchor is on the bottom, the buoy slides down the line and it's buoyancy lifts the anchor off the bottom, ending up trailing behind together on the surface. Just pull it in. This is a old timer trick that lessens the effort of pulling an anchor in deep water to a fraction! Try it!!