Which of the following lists three common types of ship communication systems?

• A. Radio, satellite, and telecommunication systems
• B. Radar, sonar, and navigation systems
• C. Propulsion, steering, and power systems
• D. Antenna, fiber, and microwave systems

Answer: (D)

The main idea here is recognizing the different ways ships carry and transfer information. The best choice reflects three core communication pathways used on vessels: antennas, fiber, and microwave systems. Antennas are the hardware that send and receive radio signals, forming wireless links for voice and data. Fiber provides the high-capacity, low-loss backbone for shipboard networks and external connections, carrying large amounts of information quickly. Microwave systems offer high-speed, line-of-sight wireless links for ship-to-ship or ship-to-shore communications, often used when satellite paths aren’t available or as a complementary option.

The other options mix in systems that aren’t primarily for communication (like radar, sonar, and navigation) or focus on ship machinery (propulsion, steering, power). They don’t represent the key modalities of ship communication in the way that antenna, fiber, and microwave do.