The package offers a solution to the problem that when you link to a float
using hyperref, the link anchors to below the float's caption, rather than the
beginning of the float. Hypcap defines a separate \capstart command, which you
put where you want links to end; you should have a \capstart command for each
\caption command. Package options can be used to auto-insert a \capstart at the
start of a float environment.