It is never possible to make use of the full depth of water, since there has to be some safety margin between the bottom of the ship and the sea bed.
Ayizange yenzeke into yokuba kusetyenziswe ubunzulu ngokupheleleyo bamanzi, ngenxa yokuba kwakufuneka kukho ukhuseleko phakathi komphantsi wenqanawa kwakunye nentsele yolwandle.