46 C.F.R. § 182.620 Auxiliary means of steering.
Title 46 - Shipping
(a) Except as provided in paragraph (c) of this section, a vessel must be provided with an auxiliary means of steering that is: (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; (2) Multiple screw propulsion, with independent pilothouse control for each screw, is provided, and the vessel is capable of being steered using pilothouse control; (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. [CGD 85–080, 61 FR 986, Jan. 10, 1996, as amended by CGD 97–057, 62 FR 51050, Sept. 30, 1997]
Title 46: Shipping
PART 182—MACHINERY INSTALLATION
Subpart F—Steering Systems
§ 182.620 Auxiliary means of steering.

