By 22:15, Hipper was finally able to transfer to Moltke; he then ordered his ships to steam at 20 knots (37 km/h; 23 mph) to take up their station at the head of the German line. Only Moltke and Seydlitz, however, were in condition to comply; Derfflinger and Von der Tann could make at most 18 knots, and so these ships lagged behind.[53] An attack by British light cruisers caused the German formation to fall into disarray.