From 1968 until September 2008, the Bishop Museum owned the "Falls of Clyde", the oldest sail-driven oil tanker, which was moored at the Hawai‘i Maritime Center. In early 2007, the ship was closed to public tours for safety reasons and in order to facilitate repairs to the deteriorating tank, which frequently caused the ship to list (tilt) dramatically. Marine experts conducted a thorough inspection of the ship. Between 1998 and 2008 the museum incurred more than $2 million in preservation costs.