At 10:40, one of "Lion"s shells struck "Seydlitz" causing nearly catastrophic damage that knocked out both of the rear turrets and killed 159 men. Disaster was averted when the executive officer ordered the flooding of both magazines to avoid a flash fire that would have destroyed the ship. By this time, the German battlecruisers had zeroed in on "Lion" and began scoring repeated hits. At 11:01, an shell from "Seydlitz" struck "Lion" and knocked out two of her dynamos. At 11:18, "Lion" was hit by two shells from "Derfflinger", one of which struck the waterline and penetrated the belt, allowing seawater to enter the port feed tank. This shell eventually crippled "Lion" by forcing the ship to turn off its engines because of seawater contamination.