Before revision: Lake freighter unloading limestone SS Carl D. Bradleyunloading hopper in 1958 A self-discharger (or self-unloader) is a ship that is able to discharge its cargo using its own gear.
After revision: Lake freighter unloading limestone SS Carl D. Bradley unloading hopper in 1958 A self-discharger (or self-unloader) is a ship that is able to discharge its cargo using its own gear.