281. Your ship is equipped with ALCAP heavy fuel oil purifiers. The watchstander reports excessive water drained from the fuel oil service tank. Which component should he check?

Excessive water in the fuel oil service tank indicates a failure in the clean oil discharge line. The water transducer in this line controls water detection and separation; a malfunction allows water to pass into the service tank. Therefore, the watchstander should check the water transducer located in the clean oil discharge line.