46 CFR § 182.620 - Auxiliary means of steering.
(1) Of adequate strength;
(2) Capable of moving the rudder from 15 degrees on one side to 15 degrees on the other side in not more than 60 seconds with the vessel at one-half its maximum service speed ahead, or 7 knots, whichever is greater; and
(3) Controlled from a location that permits safe maneuvering of the vessel and does not expose the person operating the auxiliary means of steering to personnel hazards during normal or heavy weather operation.
(b) A suitable hand tiller may be acceptable as the auxiliary means of steering where satisfactory to the cognizant OCMI.
(c) An auxiliary means of steering need not be provided if:
(1) The main steering gear and its controls are provided in duplicate;
(3) No regular rudder is fitted and steering action is obtained by a change of setting of the propelling unit; or
(4) Where a rudder and hand tiller are the main steering gear.