Nubian lost her stern just aft of the screws in the attack associated with Formidable's damage. The loss removed her rudder but left the screws available for steering by adjusting engine power. She therefore retained a way to navigate back despite severe damage to the end of the ship. The comparison with Eskimo's bow loss at Narvik separates two frequently confused incidents and explains why losing the stern had a smaller effect on Nubian's speed.
Notable Point · 55:35-56:18
Nubian lost her rudder but could steer with her engines
Nubian's stern damage left her able to steer with engine power, unlike the more speed-restricting bow damage suffered by Eskimo.