What is the operating water temperature range for the RBS II?

• A. 28-105 degrees
• B. 20-90 degrees
• C. 32-120 degrees
• D. 10-60 degrees

Answer: (A)

The water temperature range tested for the RBS II reflects the conditions the cooling system is designed to handle in real sea environments. Seawater is used for cooling, and the system is designed to operate reliably from about 28 degrees Fahrenheit up to about 105 degrees Fahrenheit. The lower limit around 28°F corresponds to the freezing point of seawater given its salinity, so water colder than that would be a liquid only briefly or not at all, which could impair cooling. The upper limit around 105°F covers very warm tropical waters where cooling remains effective but stress on the system starts to rise; beyond this, cooling efficiency can drop and engine temperatures may climb toward unsafe levels. In short, this range ensures the cooling system stays within safe and effective operating conditions across common environmental temperatures.