Section 19(ii) in The Merchant Shipping (Fire Appliances) Rules, 1969
(ii)the number and position of the hydrants in accommodation, service and machinery spaces shall be such as to ensure that at least two jets of water not emanating from the same hydrant, one of which shall be from a single length of hose, may reach any part of the ship normally accessible to passengers and crew while the ship is being navigated;
