[2] A sample point on the discharge line allows for the analyzer to determine the oil content of the ballast now and slop water in PPM.
[2] The analyzer is self-maintaining by periodical cleansings with fresh water, and therefore requires a minimum of active maintenance from the crew.
[2] The valves that direct the ballast water either over board or to slop tank are controlled by the integrated computer, and a GPS signal further automates the process by including special areas and completes the required input for the Oil Record Book.
[3] Oil Discharge Monitoring systems today consist of a computing unit that is installed in the cargo control room.
[7] ODME systems also have an analyzing unit that contains the Oil content meter, a fresh water valve for cleaning purposes, and a pressure transmitter that monitors the sample flow through the measuring cell.