Which of the following is true concerning the class "D" air conditioning system shown in the following illustration? Illustration GS-RA-42 Illustration GS-RA-42: the U.S. Coast Guard has not released this illustration.

Correct Answer: Option D — The duct thermostat determines the amount of water flow circulating through the cooling coil.

In direct-expansion marine air conditioning systems with chilled water loops, the space or duct thermostat directly modulates the motorized chilled water control valve, regulating water flow through the cooling coil to maintain strict temperature control.