What is pumped overboard?

Some articles on pumped overboard, overboard:

Submarine - Life Support Systems
... a CO2 scrubber, which uses an amine absorbent to remove the gas from air and diffuse it into waste pumped overboard ... to flush toilets, and the resulting "black water" is stored in a sanitary tank until it is blown overboard using pressurized air or pumped overboard by using a special sanitary pump ... The method for blowing sanitaries overboard is difficult to operate, and the German Type VIIC boat U-1206 was lost with casualties because of a mistake with the toilet ...

Famous quotes containing the word overboard:

    I’m going overboard with a capital O.
    Harold Adamson (1906–1980)