((a)) A new tanker of at least 10,000 gross tons as measured under , or an alternate tonnage measured under as prescribed by the Secretary under shall be equipped with—

((1)) 2 remote steering gear control systems operable separately from the navigating bridge;

((2)) the main steering gear control in the steering gear compartment;

((3)) means of communications and rudder angle indicators on the navigating bridge, a remote steering gear control station, and the steering gear compartment;

((4)) at least 2 identical and adequate power units for the main steering gear;

((5)) an alternative and adequate power supply, either from an emergency source of electrical power or from another independent source of power located in the steering gear compartment; and

((6)) means of automatic starting and stopping of power units with attendant alarms at all steering stations.

((b)) An existing tanker of at least 10,000 gross tons as measured under , or an alternate tonnage measured under as prescribed by the Secretary under shall be equipped with—

((1)) 2 remote steering gear control systems operable separately from the navigating bridge;

((2)) the main steering gear control in the steering gear compartment; and

((3)) means of communications and rudder angle indicators on the navigating bridge, a remote steering gear control station, and the steering gear compartment.