Retrievable tether

A retrievable tether comprising:

• a housing, said housing further comprising two substantially concave halves defining an interior and exterior of each, said halves further provided with a hemispherical void in their periphery such that an exit hole is formed thereby;
• one of said halves having molded therein a slotted post aligned proximate with an opening in said other half and capable of accepting a fastening means for securing said halves together;
• said housing halves being provisioned with at least one hole to allow water to flow out or in said hole and a substantially rectangular peripheral opening stepped at each end;
• each housing half further having a race provided therein substantially concentric to said slotted post;
• a reel sized to be contained in said halves and concentric to said slotted post and said races, and contained thereby, said reel having;a slotted interior surface;
• a coiled spring sized to fit inside said reel, said spring engaged in the slot of said slotted post and in said reel's slotted interior surface;
• a spring plate having a hole in its center, said plate located in said halves and retaining said spring in said reel when said halves are joined;
• a friction brake sized for acceptance in said stepped peripheral slot in said halves, said brake having a raised portion serrated to allow actuation by a user's finger, said brake positioned such that engagement with said reel is possible by means of said steps;
• and
• a tether wound around said reel and exiting said halves through said exit hole, said tether capable of being connected to a weight and tensioned by means of said spring-reel assembly in said joined halves, said tether metered by use of said brake and retrievable by means of said spring when said brake is released.