I'm sorry Gank but you're wrong, I checked all my source books last night. Sansweet's encyclopaedia, the Star Wars technical journal, the Guide to ships and vehicles, and Dark Empire, all list an SSD as being 8000m long, = 8 kilometers = 5miles. An ISD is 1600m long = 1.6kilometers = 1 mile = 5x smaller than an SSD An Mc80a can match an ISD, it is slightly smaller, but has more concentrated weapons, and more shield, so it can last for longer. An Mc80b, like the Mon Remonda, was able to give an SSD a run for its money when it had an Mc80a and a couple of smaller ships with it. Therefore, an Mc90 must be at least a match for an SSD.