Which method can enhance communication with other vessels during sea operations?

Using visual signals such as flags and lights is a proven method for enhancing communication with other vessels during sea operations. These signals are part of the International Code of Signals, which provides a standardized system that mariners around the world understand. Visual communication is essential, especially in situations where radio communication may be hindered by noise, distance, or equipment failure.

Visual signals can convey critical information quickly and effectively, such as indicating intentions, distress situations, and navigational warnings. For instance, signal flags can be used to communicate everything from "I have a diver down; keep clear" to requesting assistance. Lights can also be employed to signal specific messages at night or in low visibility, further ensuring that vessels can communicate even in adverse conditions.

While navigational charts, online communication tools, and fuel management systems play important roles in maritime operations, they do not directly facilitate immediate communication between vessels as visual signals do. Charts are primarily for navigation and situational awareness, online tools mostly enhance information sharing on shore or for planning, and fuel management focuses on operational efficiency rather than real-time communication.