Name one type of communication system used by the Navy.

The Very Low Frequency (VLF) communication system is a critical communication tool used by the Navy, particularly for its ability to communicate with submarines while they are submerged. VLF signals can penetrate water to some extent, which allows for reliable communication in environments where other systems might fail.

VLF systems transmit at frequencies typically between 3 kHz and 30 kHz, which allows for long-range communications, even under challenging conditions. This capability is essential for maintaining contact with submarines, ensuring they can receive operational commands and safely communicate with command structures.

While High Frequency, Digital Communications, and Satellite Broadcasting systems also serve important roles in Navy communications, their applications and limitations differ significantly from the unique advantages offered by VLF systems, especially in underwater scenarios.