What is usually the initial action when a pilot reaches the DH without visual references?

When a pilot reaches the Decision Height (DH) without having established visual references, the appropriate action is to initiate a missed approach. The DH represents the minimum altitude at which a pilot must have visual contact with the runway environment to continue the landing safely. If the necessary visual references, such as the runway or approach lights, are not visible at this critical point, proceeding with the landing could pose significant safety risks. Initiating a missed approach allows the pilot to safely climb away from the runway environment and follow predetermined procedures to either attempt the approach again or divert to an alternate landing site. This action is a crucial part of maintaining safety and adhering to established aviation protocols.