What is the length of the Klingon ship as measured by Captain Kirk? A special relativity Question.?

A new Klingon battleship has a proper length of 800 m and travels at speeds of u = 0.29c with respect to its home planet. The Klingons prepare to battle the Enterprise, which is moving at the same speed with respect to the same planet. If the Klingons are heading straight at the Enterprise, what is the length of the Klingon ship as measured by Captain Kirk?