How is a signal radiated from an Inmarsat-C system's antenna?

The choice indicating that the signal is radiated in an omni-directional pattern accurately reflects how Inmarsat-C systems operate. Inmarsat-C terminals are designed to communicate with satellites using a signal that spreads out in all directions. This omni-directional pattern is beneficial for vessels at sea, as it allows them to maintain a connection with satellites without the need for precise alignment.

The omni-directional approach simplifies the communication process for mobile users, enabling them to send and receive messages regardless of their orientation relative to the satellite. This is particularly important for vessels that may be moving or experiencing changing conditions at sea. The technology is developed to ensure that as long as the terminal is within the footprint of the satellite, it can establish a connection effortlessly without requiring the operator to constantly adjust the antenna for correct alignment.

While options describing features such as directional signaling may exist, the fundamental operation of the Inmarsat-C system relies on its ability to function in this omni-directional manner for consistent and reliable service in maritime environments.