🔍 Key Concepts

• ARPA stands for Automatic Radar Plotting Aid and is an enhancement to standard RADAR • What specific function does ARPA add beyond simply displaying echoes on a screen? • How does a Collision Avoidance System (CAS) help the navigator use radar information?

💭 Think About

• Ask: Which option describes a system that can both acquire and TRACK targets on the radar display? • Consider: Does ARPA/CAS directly steer the ship, or does it provide information for the navigator to make decisions? • Look for the choice that focuses on processing and tracking radar targets rather than just basic radar display or helm control.

✅ Before You Answer

• Verify which choice mentions acquiring and tracking targets on the radar screen • Check that the option does NOT describe only a basic radar display with no tracking capability • Ensure the choice does not overstate ARPA/CAS as an automatic steering or ship‑control system, but rather a target‑tracking and collision‑avoidance aid