In the majority of cases the owners assume that after the ship has been used in the oil trade for 5 or 6 years they will no longer be able to conclude a profitable charter for the ship as a tanker, and then employ it for the carriage of ore.
Kumaxesha amaninzi abagcini nqanawa bacinga ukuba emva kokuba inqanawa isetyenziswe ukurhweba nge-oyile kwiminyaka emihlanu ukuya kwemithandatha abanakuphinda bakwazi ukuqukumbela nqesho olunenzuzo lwenqanawa njengenqanawa yokuthutha ipetroyile, kwaye bayiqeshele ukuthutha i-oyile ekrwada.