What color are the running lights for a vessel restricted in ability to maneuver?

The running lights for a vessel restricted in her ability to maneuver are indeed red and white. This specific lighting arrangement is outlined in the International Regulations for Preventing Collisions at Sea (COLREGS). The red light indicates the vessel's port side, while the white light represents the stern light or an additional masthead light. This configuration helps other vessels identify the specific status of the vessel, which is crucial for safe navigation.

In nautical terms, a vessel restricted in her ability to maneuver could be a tugboat engaged in towing or a vessel conducting underwater operations, and it's important for nearby vessels to recognize her limitations while navigating around her. The red and white lights provide distinct signals that contribute to enhanced visibility and communication on the water, which is essential for maritime safety.