The Dawn Chasers

From the introduction: Ahoy, mateys! Join Captain Moonlight and her crew aboard the Dawn Chaser for swashbuckling adventures on the high seas. You'll fight pirates, tangle with storms, explore a ship wreck and confront an ancient power on a lost island! This easy-to-run adventure is designed for 3rd-4th level characters, and can be completed in 4-6 hours of play.