A hinged flexible plastic shell in which barbed fishing lures and fish-hooks in general may be kept to avoid injury connects to a fishing rod merely by an operator’s closing of its lid upon the rod by pop-open and pop-shut manipulation of certain nodes atop the shell’s lid. The simplified version is coded by means of a predetermined single coding technique. Intersection points are determined, where an intersection point indicates an intersection for integer multiples of a sample-time distance. After a \u201cstart\u201d signal has been received, the beacon is energized for a short time interval during which an electromagnetic field is generated, which is measured by the MWD apparatus. First and second switching elements, coupled to the first and second charging elements, respectively, are adapted to activate the first and second charging elements responsive to a rising edge of the waveform. One to four LED light modules are secured to the mounting plate and are mounted thereon in such a way to achieve various lighting patterns.