wasting time.
 
The Speed Needle attaches to the clip under the rifle stock, to this is connected the floatline which in turn connects to the Speed Stringer equipped with a retention flap, which in turn is connected to the buoy.
Basically once you catch the fish you disconnect the Speed Needle from underneath the butt of the rifle, and pass it through the gills or another point on the fish's body and continue fishing normally. As we fish the fish will naturally flow along the floatline. Once it arrives in the vicinity of the buoy it will encounter the Speed Stringer and pass through the retention fin, becoming trapped between the buoy and the fin, on the steel cable.

 
An ingenious system, try it!