What are advantages of nuclear-powered submarines?

• A. Reduced crew requirements and minimal maintenance.
• B. Near unlimited endurance, high sustained speed, ability to remain submerged for extended periods, and increased stealth.
• C. Diesel-electric propulsion with limited submerged time.
• D. Lower cost with frequent resupply needed.

Answer: (B)

The advantage comes from the nuclear reactor’s ability to provide large, continuous power, which lets a submarine stay underwater for long periods, move at high sustained speeds, and do so without frequent surface breaks. This combination—near unlimited endurance, high sustained speed, extended submerged operation, and greater stealth from not needing to surface or snorkel—defines why nuclear-powered submarines are so capable. In contrast, options describing diesel-electric propulsion, reduced crew or maintenance, or lower costs with frequent resupply don’t fit the realities of nuclear propulsion: these subs carry substantial maintenance needs, require a sizable crew, and involve high upfront costs with long intervals between refueling rather than frequent resupply.