Harpoon device and methods of use

A harpoon device having separable components comprising:

• a functional unit selected from a dart, a gaff, a knife, a blade, a brush, and a tagging stick or other functional tip, and the functional unit is further attachable to a line;
• a shank having a proximal end and a distal end, wherein the distal end of the shank is attachable to the functional unit;
• a power head having a proximal end and a distal end, wherein the distal end of the head is attachable to the proximal end of the shank;
• a coupler threaded on outer surfaces of coupler ends;
• a shaft having a distal end and a proximal end, wherein the distal end of the shaft is attachable to the proximal end of the head, the shaft comprising a plurality of cylindrical hollow shaft segments, wherein each shaft segment is identically threaded on inner surfaces of ends of the shaft segments, each of said ends of the shaft segments being attachable by the coupler threaded on outer surfaces of the coupler ends, wherein an inner diameter of the shaft is sufficiently greater than an outer diameter of the coupler and the coupler joins the shaft segments by a rotational screw mechanism, and wherein the shaft segments are selected from at least one of a long shaft segment and a short shaft segment, and wherein an outer surface of at least one shaft segment of the plurality of shaft segments comprises a rough grip means along at least a portion of its length, wherein the rough grip means is a sandblasted portion of the at least one shaft segment;
• a cap attachable to the proximal end of the shaft, the cap having a clip for securing the line thereto, the clip having a guide ring;
• and
• a line having first and second ends and an intermediate portion therebetween, the first end of the line being attached to the functional unit, the intermediate portion passing through the guide ring, and the second end of the line being attached to a buoy.