Passenger ships engaged on international voyages may in some cases carry buoyant apparatus for 25 per cent of the total number of persons on board.
Iinqanawa zabahambi ezifakwe kuhambo lwamazwe elungathi kwezinye iimeko zithwale izixhobo zamandla okudadisa ngo25% wenani elipheleleyo labantu abangaphakathi enqanaweni.