Constitution III

The  was an Earth sailing vessel, slightly bigger than a schooner, but still basically a yacht. It was plying the Pacific in the 1930s with passengers from Paragon Studios when it attempted a very narrow reef passage and was struck by an unidentified object. This forced it out of its narrow clearance channel, and caused the ship to run aground. It also put a three-foot hole into the hull. (MA: The Eye of the Giant)