TDZ and MDZ refer to danger zones for which threats?

• A. Torpedo and Depth-charge threats
• B. Missile and Mine threats
• C. Torpedo and Missile threats
• D. Air-borne threats only

Answer: (C)

TDZ and MDZ refer to the danger zones for two kinds of weapons that threaten a ship: torpedoes and missiles. TDZ stands for Torpedo Danger Zone, the area within which a torpedo could reach the vessel given its speed and the ship’s defenses. MDZ stands for Missile Danger Zone, the area where a missile could threaten the ship, whether it’s launched from air or surface and depending on the missile’s range and the ship’s countermeasures. These zones guide how quickly you need to detect, track, and respond with defensive actions. The other options don’t fit because depth charges and mines are different threat types and aren’t described by these combined zones, and restricting to air-borne threats only misses the underwater torpedo threat that TDZ captures.