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102. Application of Part VD
This Part applies to existing ships of Classes I, II and II(A) and to new passenger ships other than Hong Kong ships of Class I or II carrying not more than 36 passengers.

103. Existing passenger ships carrying not more than 36 passengers
(1) Every ship to which this Part applies shall comply with rules 48 to 51 inclusive, rules 58, 59(1), 60, 61, 63(1)(a) to (d) and 63(2)(c) to (g) of the Merchant Shipping (Passenger Ship Construction) Rules 1965 (S.I. 1965/1103 U.K.). Where insulated “A” Class divisions are required by those rules, the Director may permit smaller amounts of insulation to be fitted than are required by rule 50(1) of those rules.
(2) In every ship to which this Part applies the following additional provisions shall apply—
(a) all stairways and means of escape in accommodation and service spaces shall be of steel or other equivalent material;
(b) power ventilation of a machinery space shall be capable of being stopped from an easily accessible position outside the space;
(c) except where all bulkheads in accommodation spaces conform with the requirements of rules 53(1) and 54(1) of the Merchant Shipping (Passenger Ship Construction) Rules 1965 (S.I. 1965/1103 U.K.), such ships shall be provided with an automatic fire alarm and fire detection system conforming with rule 55 of those rules, and in accommodation spaces the corridor bulkheads shall be of steel or shall be non-combustible “B” Class divisions.

104. Application of Part VI
This Part applies to every new passenger ship to which these regulations apply.

105. General
In every ship to which this Part applies the machinery, boilers and other pressure vessels shall be of a design and construction adequate for the service for which they are intended and shall be so installed and protected as to minimise any danger to persons on board. Without prejudice to the generality of the foregoing, means shall be provided which shall prevent overpressure in any part of such machinery, boilers and other pressure vessels, and in particular every boiler and every unfired steam generator shall be provided with not less than 2 safety valves:
Provided that the Director may, having regard to the output or any other features of any boiler or unfired steam generator, permit only one safety valve to be fitted if he is satisfied that adequate protection against overpressure is thereby provided.

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106. Boilers and other pressure vessels
(1) In every ship to which these regulations apply every boiler or other pressure vessel and its respective mountings shall, before being put into service for the first time, be subjected to a hydraulic test to a pressure suitably in excess of the working pressure which will ensure that the boiler or other pressure vessel and its mountings are adequate in strength and design for the intended service, having regard to—
(a) the design and material of which it is constructed;
(b) the purpose for which it is intended to be used; and
(c) the working conditions under which it is intended to be used,
and every such boiler or other pressure vessel shall at any time thereafter be capable of withstanding such a test.
(2) Provision shall be made which will facilitate the cleaning and inspection of every pressure vessel.

107. Machinery
(1) In every ship to which these regulations apply the main and auxiliary machinery necessary for the propulsion and safety of the ship shall be provided with effective means of control, and the machinery shall be capable of being brought into operation when initially no power is available in the ship.
(2) In every such ship, where risk from over-speeding of machinery exists, means shall be provided to ensure that the safe speed is not exceeded, and in particular a governor shall be provided for any turbine or set of turbines which drives a single gear wheel forming part of the main propelling machinery so as to shut off the steam automatically in the event of overspeed. A hand trip gear shall also be provided for that purpose.
(3) In every such ship means shall be provided which will shut off automatically the steam from any ahead turbine and any other machinery served by the same lubricating oil system as the turbine in the event of any failure of that system.
(4) In every such ship where main or auxiliary machinery or any parts of such machinery are subject to internal pressure those parts shall, before being put into service for the first time, be subjected to a hydraulic test to a pressure suitably in excess of the working pressure having regard to—
(a) the design and the material of which they are constructed;
(b) the purpose for which they are intended to be used; and
(c) the working conditions under which they are intended to be used,
and such parts shall at any time thereafter be capable of withstanding such a test.

108. Astern power
(1) Every ship to which these regulations apply shall have sufficient power for going astern to secure proper control of the ship in all normal circumstances.
(2) The ability of the machinery to reverse the direction of thrust of the propeller in sufficient time, under normal manoeuvring conditions, and so to bring the ship to rest from maximum ahead service speed shall be demonstrated.

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109. Shafts
In every ship to which these regulations apply every shaft shall be so designed and constructed that it will withstand the maximum working stresses to which it may be subjected, with a factor of safety which is adequate having regard to—
(a) the material of which it is constructed;
(b) the service for which it is intended; and
(c) the type of engines by which it is driven or of which it forms a part.

110. Boiler feed systems
(1) In every ship to which these regulations apply every boiler fitted shall be provided with not less than 2 efficient and separate feed systems so arranged that either of such systems may be opened up for inspection or overhaul without affecting the efficiency of the other. Means shall be provided which will prevent overpressure in any part of the systems.
(2) In every such ship in which boilers are fitted there shall be provided not less than 2 feed pumps and when the boilers are operating under full load conditions, there shall be at least 1 feed pump available for stand-by duties.
(3) In every such ship in which boilers are fitted provision shall be made to ensure that a supply of suitable reserve feed water is available, having regard to the nature and intended duration of the voyage.
(4) If it is possible for oil to enter the feed water system in any such ship, the arrangements for supplying boiler feed water shall provide for the interception of oil in the feed water.
(5) Every feed check valve, fitting or pipe through which feed water passes from a pump to the boilers in any such ship shall be designed and constructed to withstand the maximum working stresses to which it may be subjected, with a factor of safety which is adequate having regard to the material of which it is constructed and the working conditions under which it will be used. Every such valve, fitting or pipe shall, before being put into service for the first time, be subjected to a hydraulic test suitably in excess of the maximum working pressure of the boiler to which it is connected or of the maximum working pressure to which the feed line may be subjected, whichever shall be the greater, and shall at any time thereafter be capable of withstanding such a test.
(6) In every such ship where oil fired water tube boilers are fitted, an automatic boiler water low level alarm and an automatic boiler water low level shut off valve in the fuel supply pipe to the furnace fronts shall be provided.