Answer
For type A ships
1.Machinery casings on type A ships, be protected by one of the following arrangements:
a)An enclosed poop or bridge of at least standard height; or
b)A Deckhouse of equal height and equivalent strength.
2.Machinery casings may, however, be exposed if there are no openings giving direct access from the freeboard Deck to the machinery space. A door complying with the requirements of regulation 12 is acceptable in the machinery casing, provided that it leads to a space or passageway which is as strongly constructed as the casing and is separated from the stairway to the engine-room by a second weathertight door of steel or other equivalent material.
3.A fore and aft permanent gangway, shall be fitted on type 'A' ships at the level of the superstructure Deck between the poop and the mid ship bridge or Deckhouse where fitted.
4.Safe access from the gangway level shall be available between separate crew accommodations and also between crew accommodations and the machinery space
5.Exposed hatchways on the freeboard and forecastle Decks or on the tops of expansion trunks on type ‘A’ ships shall be provided with efficient watertight covers of steel or other equivalent material.
6.Type ‘A’ ships with bulwarks shall have open rails fitted for at least half the length of the weather Deck or other equivalent freeing arrangements. A freeing port area, in the lower part of the bulwarks, of 33% of the total area of the bulwarks, is an acceptable equivalent freeing arrangement.