If a nuclear-powered submarine (SSN or SSBN) collided with an aircraft carrier, the outcome would largely depend on several factors, including the circumstances of the collision, the speed of the vessels, and the areas of impact. Both types of ships are massive and designed to withstand a fair amount of stress, but they have very different structures, purposes, and vulnerabilities.
1. Aircraft Carrier’s Vulnerabilities:
An aircraft carrier is a huge, surface vessel designed to carry and launch aircraft. These ships are not built with the intention of withstanding collisions, especially with submarines. Key vulnerabilities of an aircraft carrier include:
Hull Design: Aircraft carriers are designed to be large and relatively flat, with extensive decks for launching and landing aircraft. While they have thick, reinforced hulls to withstand the stresses of the sea and some damage, the hull is not designed to resist direct collisions with a powerful submarine.
Aircraft and Equipment: The superstructure and the flight deck house aircraft, sensitive electronics, and a large crew. A collision could easily damage or destroy aircraft, launch systems, or cause fires due to the highly flammable fuel and munitions on board.
Internal Structure: While the aircraft carrier has multiple watertight compartments to keep it afloat, a severe enough collision could breach several compartments, leading to flooding and potentially catastrophic damage, especially if the collision occurs in or near key sections like the flight deck or hangar bays.
2. Nuclear Submarine's Vulnerabilities:
A nuclear submarine, while a much smaller vessel in comparison to the aircraft carrier, is a highly resilient and powerful machine designed to withstand extreme pressures at great depths. However, submarines are not invulnerable either. Key vulnerabilities include:
Hull Pressure Resistance: The pressure hull of a submarine is designed to withstand enormous depths underwater, but it is designed for gradual pressure over time, not for sudden impacts. A collision could damage or breach the pressure hull, which would be catastrophic for the submarine.
Propulsion System: A submarine's propulsion and reactor systems are critical to its operation. Damage to these systems could cause a loss of power, making it immobile or leading to radiation leaks, depending on the severity of the damage.
Ballast Tanks and Flooding: While a nuclear submarine can withstand certain degrees of flooding, a collision with a massive surface vessel like an aircraft carrier could cause substantial flooding that might threaten the submarine's buoyancy and stability.
Potential Outcomes of the Collision:
Damage to the Aircraft Carrier:
If the submarine were to collide with the aircraft carrier at high speed or in a vulnerable area (like the hull beneath the waterline or the propulsion section), the carrier could suffer severe structural damage. The force of the impact could breach the hull and cause flooding, potentially incapacitating the carrier. The aircraft and equipment on the flight deck could be destroyed, and the vessel would likely be rendered immobile or require extensive repairs.
The size and design of the aircraft carrier mean it would not be able to "dodge" a collision, especially if the submarine were submerged and struck from an unexpected angle.
Damage to the Submarine:
A collision with an aircraft carrier could cause catastrophic damage to the submarine's pressure hull, which is the most critical part of the vessel. Even though submarines are built to withstand extreme pressure underwater, the impact from a massive surface vessel could breach the hull, causing flooding and potentially sinking the submarine.
The submarine could be badly damaged, rendering it inoperable, and possibly forcing the crew to abandon ship if the flooding is extensive enough.
Which Ship Would Have the Advantage?
In a direct collision, the aircraft carrier would likely have the advantage in terms of survival, simply because it is much larger and more robust. The aircraft carrier would also have its watertight compartments, which would increase its chances of staying afloat after the collision. However, the damage would likely be more severe to the submarine due to its smaller size and the fragile nature of its pressure hull. The submarine could be sunk or severely disabled by even a moderate collision.
That said, a submarine could still cause significant damage to the aircraft carrier, especially if the submarine's attack was targeted at the carrier's vital components (such as the propulsion or hull below the waterline). While the carrier might survive in this case, it could be rendered combat ineffective or need significant repairs, while the submarine would likely be more severely damaged, if not sunk.