Four lifting lighters , with a capacity of 1,000 long tons ( 1,000 t ) , were hired .
Lighters would not suffice to lift a water - logged 5,000 long tons ( 5,100 t ) ship .
Four lifting lighters , with a capacity of 1,000 long tons ( 1,000 t ) , were hired , but they would not suffice to lift a water - logged 5,000 long tons ( 5,100 t ) ship .