Tide Clock is for boaters, fisherman, sailors, surfers, sun bathers, swimmers, kayakers, waterskiers, wakeboarders, paddle boarders, wind surfers, sheller's, and generally any non-landlubber or beach goer's. Tide Clock is just that - a clock that keeps track of high and low tides. Tide Clock is easy to set - as of version 1. 2. 0 set the tide with your finger. Version 1.