My Lost Treasure: Grand Funk Railroad

The theme is transportation right now on My Lost Treasure.  Today's band even fits the theme with their name, but we're way past the train section.  We're also done with planes and automobiles.  We're working on ships and boats.

The song I picked for today is a long one. Ten minutes (I always thought it would be perfect at about eight minutes).  And it's been released under more than one title.  Sometimes it's I'm Your Captain.  Sometimes it's Closer To Home.  Sometimes it's I'm Your Captain/Closer To Home, and vice versa.  No matter what you call it, it's a great song and a great memory.  And it fits the theme.

Have any ideas for songs about boats or ships?  Let me know...I've got quite a few in my head already, but I'm always open to suggestions.