Section 8(2) in The Merchant Shipping (Cargo Ship Construction And Survey) Rules, 1974
(2)The emergency source of electric power required under sub-rule (1) shall be capable of operating the following services simultaneously, for a consecutive period of not less than three hours, namely :-(a)the emergency lighting required under the Indian Merchant Shipping (Life Saving Appliances) Rules, 1956;(b)the general alarm, if electrically operated; and(c)the ship's navigation lights, if solely electric.
