Question 137 Deck Safety

The correct answer is C) HF SITOR. HF (high-frequency) radio systems are more susceptible to fading and static interference compared to other systems like VHF (very high-frequency) or satellite-based communications. This is because HF signals are affected by atmospheric conditions, solar activity, and other environmental factors that can cause signal fading and interference. In contrast, VHF systems (option A) and satellite-based systems like INMARSAT (option B) are less affected by these issues, while Digital Selective Calling on channel 70 (option D) uses a dedicated digital system that is more reliable and less prone to interference.