A vessel is in this condition when she cannot be controlled,
perhaps by failure of her steering gear, even though her master is aboard and
in charge. By night she carries two all-round red lights, one vertically above
the other, instead of her forward and after white Steaming lights, but with her
red and green Running lights and her Stern light if she is making way. By day
she carries two Black balls or shapes, one vertically above the other.