A system for deploying a cable, such as a ship’s anchor chain, wherein the chain is measured as it is deployed and the deployed length displayed on a visual display. The trace may be a numerical value that decreases as a function of the time that has elapsed since the first trace was generated. The fixing driving gear mechanism includes a mechanism which interrupts a transmission of the driving force when rotating in the reverse direction. The main body portion of the stent is formed by winding a yarn formed of a biodegradable polymer in a tube form as the yarn is bent in a zigzag design. Playlists can be virtualized with a logical content identifier which maps to a list of virtual content identifiers. The threaded male portion of the middle ring includes a plurality of openings for receiving a plurality of securing members, with each of the plurality of securing members capable of moving in each of the plurality of grooves and capable of securing the middle ring to the inner ring.