5 July 2016

Ship Steering Gear System – SOLAS Requirements-ETO


Steering System – SOLAS Requirements

Regulation 29. STEERING GEAR

(a)  Passenger ships and cargo ships
•     Ships shall be provided with a main steering gear and an auxiliary steering gear to the  satisfaction of the Administration.

         The main steering gear shall be of adequate strength and sufficient to steer the ship at  maximum service speed. The main steering gear and rudder stock shall be so designed  that they are not damaged at maximum astern speed.

         The auxiliary steering gear shall be of adequate strength and sufficient to steer the ship  at navigable speed and capable of being brought speedily into action in an emergency.  (iv) The exact position of the rudder, if power operated, shall be indicated at the  principal steering station.

Passenger ships only,
         The main steering gear shall be capable of putting the rudder over from 35 degrees on  one side to 35 degrees on the other side with the ship running ahead at maximum  service speed. The rudder shall be capable of being put over from 35 degrees on either  side to 30 degrees on the other side in 28 seconds at maximum service speed.

        The auxiliary steering gear shall be operated by power in any case in which the Administration would require a rudder stock of over 228.6 millimetres (9 inches) diameter in way of the tiller.

        Where main steering gear power units and their connections are fitted in duplicate to the satisfaction of the Administration, and each power unit enables the steering gear to meet the requirements of sub-paragraph (i) of this paragraph, no auxiliary steering gear need be required.

       Where the Administration would require a rudder stock with a diameter in way of the tiller exceeding 228.6 millimetres (9 inches) there shall be provided an alternative steering station located to the satisfaction of the Administration. The remote steering control systems from the principal and alternative steering stations shall be so arranged to the satisfaction of the Administration that failure of either system would not result in inability to steer the ship by means of the other system.

        Means satisfactory to the Administration shall be provided to enable orders to be transmitted from the bridge to the alternative steering station.

(c) Cargo ships only

        The auxiliary steering gear shall be operated by power in any case in which the Administration would require a rudder stock of over 355.6 millimetres (14 inches) diameter in way of the tiller.

        Where power-operated steering gear units and connections are fitted in duplicate to the satisfaction of the Administration, and each unit complies with sub-paragraph
            of paragraph (a) of this Regulation, no auxiliary steering gear need be required,                           provided that the duplicate units and connections operating together comply with sub-                 paragraph
            of paragraph (a) of this Regulation.

Regulation 30. ELECTRIC AND ELECTRO HYDRAULIC STEERING GEAR*

(a)    Passenger ships and cargo ships. Indicators for running indication of the motors of  electric and electro hydraulic steering gear shall be installed in a suitable location to the  satisfaction of the Administration.
     
      (b) All passenger ships (irrespective of tonnage) and cargo ships of 5,000 tons gross tonnage and upwards
        Electric and electro hydraulic steering gear shall be served by two circuits fed from the main switchboard. One of the circuits may pass through the emergency switchboard, if provided. Each circuit shall have adequate capacity for supplying all the motors which are normally connected to it and which operate simultaneously. If transfer  arrangements are provided in the steering gear room to permit either circuit to supply any motor or combination of motors, the capacity of each circuit shall be adequate for the most severe load condition. The circuits shall be separated throughout their length as widely as is practicable.

        Short circuit protection only shall be provided for these circuits and motors.

 (c) Cargo ships of less than 5,000 tons gross tonnage, (i) Cargo ships in which electrical  power is the sole source of power for both main and auxiliary steering gear shall comply  with sub-paragraphs (i) and (ii) of paragraph (b) of this Regulation, except that if the  auxiliary  steering gear is powered by a motor primarily intended for other services,  paragraph (6)(ii) may be waived, provided that the Administration is satisfied with the  protection arrangements.

       (ii) Short circuit protection only shall be provided for motors and power circuits of electrically or electro hydraulically operated main steering gear.

         Where the rudder stock is greater than 230 mm an alternative power supply is to be provided automatically from the ship’s emergency power supply or from an independent source of power located in the steering gear compartment


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Ship Steering Gear System – SOLAS Requirements-ETO
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