USNA Third-Class Midshipman (3/C) Professional Competency Assessment (PCA) Practice Test

The MK 48 Advanced Capability (ADCAP) Heavyweight Torpedo employs an acoustic-homing guidance system, which is essential for its operation in underwater environments. Acoustic-homing works by utilizing sound waves to detect and track its target, allowing the torpedo to home in on the noise generated by a target vessel. This method is effective because it can operate in a challenging underwater setting, often with multiple noise sources that could potentially obscure other guidance systems.

The acoustic-homing capabilities of the MK 48 torpedo enable it to be highly versatile and effective against a range of surface ships and submarine threats. This system allows the torpedo to adapt its path in real time based on the sounds it receives, which is crucial for successfully engaging targets that may be maneuvering or attempting to evade.

Other guidance systems mentioned in the choices do not align with the operational design of the MK 48. Electromechanical guidance is typically less flexible and cannot adapt as effectively to dynamic environments. GPS navigation is not suitable for underwater applications, as GPS signals cannot penetrate water effectively. Magnetic guidance is also not commonly used for modern torpedoes, as it tends to be less reliable compared to acoustic methods in the underwater domain.