Section 31(6) in The Merchant Shipping (Crew Accommodation) Rules, 1960
(6)Every permanent hospital shall include a hospital ward fitted on at least two side scuttles at least 30.5 centimetres in diameter. The side scuttles shall be capable of being opened and of as large a size as is practicable, may be substituted for a side scuttle on one side of the ward. All side scuttles in the hospital, and any sky-light therein which is exposed to the direct rays of the sun shall be provided with curtains, blinds or jalousies. The Central Government may exempt from the requirements of this sub-rule :-(a)any ship of under 1,000 tons;(b)any other ship, if it is satisfied that the permanent hospital therein is fully air-conditioned or served by a trunked mechanical ventilation system.
