What does H-Hour denote?

• A. Time first helicopter touches down
• B. Time first assault elements scheduled to touch down on beach
• C. Time D-Day commences
• D. Time line of departure

Answer: (B)

H-Hour is the exact time the assault begins—the moment the first assault elements are scheduled to touch down on the beach. This anchor time lets all parts of the operation—air strikes, naval gunfire, and landing craft—be synchronized so the beachhead can be established smoothly. The other ideas don’t fit: the first helicopter touchdown isn’t the standard defining moment, D-Day refers to the date, and the line of departure concerns when forces begin moving toward the objective, not the actual landing start.