Non-duplicated hydraulic rudder actuators may be installed in the steering-gear control systems on each vessel of less than 100,000 deadweight tons. These actuators must meet IMO A.467(XII) (incorporated by reference, see 46 CFR 58.03-1 ) and be acceptable to the Commanding Officer, Marine Safety Center. Also, the piping for the main gear must comply with 46 CFR 58.25- 10(e)(3) .
46 C.F.R. §58.25-60