Fog Bound is a musical theme composed by Klaus Badelt (with Hans Zimmer's assistance) for Pirates of the Caribbean: The Curse of the Black Pearl. It appears as track one on the film's soundtrack (original) and on the film's complete soundtrack.
The track is an extended version of the original "Fog Bound" (over one minute longer). Unlike the original version, it doesn't have the cello jig in the begining.
There's also a "super-extended" version of "Fog Bound" on the film's recording sessions. The track is over 4 minutes longer than the original version. It is 06:32 minutes long.