How do vessels typically maintain communication during operations?

Vessels typically maintain communication during operations primarily through radio transmissions and signal flags. This method is essential because radio communication allows for real-time, long-distance exchange of information, which is crucial for navigation, coordination, and safety during maritime operations. Signal flags serve as an alternative when radio silence is required or when visual communication is preferred due to proximity or the nature of the operation. The combination of these two means ensures that vessels can effectively communicate under various circumstances and maintain operational integrity.

While other methods like sonar technology are relevant for detecting submarines and underwater objects, they do not serve the primary purpose of vessel-to-vessel communication. Visual cues alone, such as use of lights or physical gestures, are limited in range and effectiveness in complex operations. Satellite communication systems are a viable option for long-range communication, particularly in remote areas, but they may not always be necessary or available for routine maritime operations, making them less fundamental than the immediate and established methods mentioned earlier.