Which statement about ARPA and RADAR integration is true?

• A. ARPA is independent of RADAR
• B. ARPA is a weather monitoring tool
• C. An integral ARPA includes both ARPA and RADAR
• D. RADAR cannot be integrated with ARPA

Answer: (C)

The main idea is how ARPA and radar work together on a ship. ARPA uses radar data to automatically track targets and calculate risk metrics like closest point of approach (CPA) and time to CPA. In practice, these functions are combined in a single system: an integral ARPA couples the ARPA processing with the radar sensor, giving you automatic plotting, tracking, and risk assessment within one unit.

That’s why this statement is the best: an integral ARPA includes both ARPA and RADAR. It reflects how modern navigation gear is designed to operate as a unified system, where radar provides the data and ARPA provides the automatic tracking and threat calculations. The other options don’t fit because ARPA depends on radar data to function, ARPA isn’t a weather-monitoring tool, and radar can indeed be integrated with ARPA.