What does the term "raw water" refer to on the RB-M 45?

The term "raw water" refers specifically to untreated water utilized for cooling systems on the RB-M 45. This type of water is crucial for the efficient operation of various onboard systems, particularly those that require efficient heat dissipation, such as engines and other mechanical components.

In this context, untreated water is drawn directly from the surrounding environment and is used for cooling before it is discharged back into the waterway. Using raw water for cooling helps maintain operational temperatures and prevents overheating of the machinery.

While options such as potable supply and freshwater from tanks pertain to water used for drinking and other essential uses on board, they do not align with the specific function of cooling systems. Saltwater as ballast, on the other hand, serves a different purpose related to stability and buoyancy, rather than cooling functions. Hence, the definition of "raw water" encompasses its role in cooling systems exclusively.