What is a primary requirement for fuel oil transfer systems on diesel propelled vessels?

For fuel oil transfer systems on diesel propelled vessels, having one pump that is independent of the main engine is a crucial safety requirement. This independence ensures that, in the event of a failure of the main engine or its associated systems, the vessel can still manage fuel oil transfer through an auxiliary pump. This setup enhances reliability and operational safety, allowing for continuous fuel supply even during emergencies or maintenance periods involving the main engine.

Additionally, this requirement helps minimize risks related to fuel oil transfer, such as contamination or fuel spills, and supports compliance with industry safety regulations. The presence of an independent pump allows for redundancy, ensuring that the crew can respond effectively to any issues that may arise with the primary pump, thereby maintaining vessel operations without interruption.