Charterer. The person or corporation hiring a ship for the carriage of goods or passengers (either a "time Charterer" or a "voyage Charterer") or leasing the ship for his own management and control (a "bareboat/demise Charterer").
Concentrates. This is a material in small particle form which results from a processing of natural ore. The main hazard associated with concentrates is that moisture entrained in the particles may settle out and the surface reach a nearly fluid state which will affect the ship’s stability if the cargo shifts. Moreover, some concentrates, such as iron concentrates produced when iron is crushed dry, contain sulphur so that if concentrates become damp the sulphur reacts with the oxygen in the surrounding air to produce heat. Compartments containing concentrates should not be ventilated in order to reduce the oxygen content.