What is the primary purpose of the windshield washer system?

The primary purpose of the windshield washer system is to clean the windshield. This system is essential for maintaining visibility for the pilots by removing dirt, debris, or any other obstructions that may accumulate on the glass during flight or on the ground. Clear visibility is critical for safe operation, especially during takeoff, landing, and adverse weather conditions.

While de-icing might be a consideration in some aircraft systems, it is not the primary function of the windshield washer system in the MH-60S. Similarly, cooling the engine and enhancing aerodynamics are unrelated to the purpose of maintaining a clean windshield for operational safety. Therefore, the effectiveness of the windshield washer system directly contributes to the overall safety and functionality of the aircraft by ensuring that the crew has an unobstructed view.