The fundamental operating principle behind DEEPWATER RELEASE is dividing the hydrodynamic resistance of the fishing line into two components: A - Hydrodynamic resistance of the vertical line (From the rod to the release clip). B - Hydrodynamic resistance of the line with the bait on it. In both cases, the hydrodynamic resistance of the line changes: exponentially with speed, proportionally with depth. The A vector is some ten times greater than the B vector and because of this even a tiny change in speed or depth causes the classical release to set off the line. This problem is now successfully solved by DEEPWATER RELEASE