The closing of watertight doors, valves, scuppers, ash-shoots and fire doors.
Ukuvalwa kweengcango kweendawo ezivalelekileyo ezingangeni manzi, isivalo, imingxuma yokuphuma amanzi emgangathweni esikhepheni aqokeleleke emgangathweni, nodubulo lomthuthu kunye neengcango zomlilo.