[Code of Federal Regulations]
[Title 46, Volume 4]
[Revised as of October 1, 2002]
From the U.S. Government Printing Office via GPO Access
[CITE: 46CFR130.140]

[Page 448-449]
 
                           TITLE 46--SHIPPING
 
    CHAPTER I--COAST GUARD, DEPARTMENT OF TRANSPORTATION (CONTINUED)
 
PART 130--VESSEL CONTROL, AND MISCELLANEOUS EQUIPMENT AND SYSTEMS--Table of Contents
 
                        Subpart A--Vessel Control
 
Sec. 130.140  Steering on OSVs of 100 or more gross tons.

    (a) Each OSV of 100 or more gross tons must have a means of steering 
that meets the--
    (1) Applicable requirements of subchapters F and J of this chapter; 
or
    (2) Requirements for a hydraulic-helm steering-system in paragraph 
(b) of this section.
    (b) Each hydraulic-helm steering-system must have the following:
    (1) A main steering gear of adequate strength for, and capable of, 
steering the vessel at every service speed without being damaged at 
maximum astern speed.
    (2) A hydraulic system with a maximum allowable working pressure of 
not more than 12,411 kPa (1,800 psi), dedicated to steering.
    (3) Piping materials that comply with subchapter F of this chapter, 
and piping thickness of at least schedule 80.
    (4) Each fore-and-aft run of piping located as far inboard as 
practicable.
    (5) Rudder stops.
    (6) Either--
    (i) Two steering pumps in accordance with Sec. 130.130(c)(3) of this 
part; or
    (ii) A single hydraulic sump of the ``cascading overflow'' type with 
a centerline bulkhead open only at the top, if each half has enough 
capacity to operate the system.
    (7) Control of the main steering gear from the pilothouse, 
including--
    (i) Control from the helm;
    (ii) Control of any necessary ancillary device (motor, pump, valve, 
or the like); and

[[Page 449]]

    (iii) Adequate visibility when going astern.
    (8) Multiple-screw propulsion with independent control of propulsion 
from the pilothouse, complying with Sec. 130.120 of this part and being 
capable of steering the vessel.
    (9) Dual hydraulic cylinders arranged so that either cylinder can be 
readily isolated, permitting the other cylinder to remain in service and 
move each rudder.
    (10) The steering alarms and indicators required by Sec. 58.25-25 of 
this chapter, located in the pilothouse.
    (11) Instantaneous protection against short circuit for electrical 
power, and control circuits sized and located as required by 
Secs. 58.25-55 (d) and (e) of this chapter.
    (12) A rudder-angle indicator, at the steering-control station in 
the pilothouse, that is independent of the control of the main steering 
gear.
    (13) Means to locally start and stop the steering pumps.
    (14) Means to isolate any auxiliary means of steering so as not to 
impair the reliability and availability of the control required by 
paragraph (b)(7) of this section.
    (15) Manual capability to center and steady the rudder if the vessel 
loses normal steering power.
    (c) For compliance with paragraph (b) of this section, a common 
piping system for pumps, helm, and cylinders is acceptable.