Which of the following systems is least likely to be subject to fading or static interference?

Correct Answer: Option B — Inmarsat

Inmarsat systems utilize satellite links, which operate at much higher frequencies than terrestrial radio. Because these signals travel directly between the ship and the satellite, they are largely unaffected by the ionospheric fading and atmospheric static that frequently disrupt MF/HF communications, ensuring consistent and reliable distress and safety messaging.