What is the ideal working depth for combat dives?

• A. 10 to 15 ft
• B. 15 to 20 ft
• C. 20 to 25 ft
• D. 25 to 30 ft

Answer: (B)

Focusing on a depth that balances safety, efficiency, and maneuverability is what this question tests. The ideal working depth for combat dives is around 15 to 20 feet. At this shallow depth, the water column provides enough buoyancy stability and light for clear vision, while keeping physiological load low. The gas you breathe remains easier to manage, and the risk of nitrogen loading and decompression needs stays modest, which is crucial for mission duration and rapid surface access if an emergency arises. You also avoid the heavier gas consumption and increased deco obligations that come with deeper depths, while staying far enough from the surface to reduce hazards from waves and current. Staying in this range gives a practical sweet spot for performing tasks efficiently and safely, making it the best choice.