The waterproof LOOP EF1500 Furler in the version for example for aluminum bowsprit pipes mounted on deck. The Furler stuck like a Spinnaker pole endfitting front in the tube and is secured there with 2 screws or rivets against falling out. The cable runs in the tube to the inner end of the bowsprit and exits there from the actually intended for a tack line hole. The cable then runs on deck in, for example, the anchor box. The waterproof battery box protects the battery from splashing water and can either be fixed or free-flying simply put in the anchor box. The battery must be removed to charge the battery box and is charged to 100% and ready for use after about one hour of charging.