Your ARPA has two guard zones. What is the...

Question 1 / 2707066636ee928f7522a1c5191a0

Question 1 of 2707066636ee928f7522a1c5191a0

Your ARPA has two guard zones. What is the purpose of the inner guard zone?

Question 1 of 27070

Your ARPA has two guard zones. What is the purpose of the inner guard zone?

🔍 Key Concepts

• ARPA (Automatic Radar Plotting Aid) guard zones – difference between inner and outer zones • How an inner guard zone helps prevent close‑quarters surprises near your own ship • Which option describes a function that is unique to the inner zone rather than the outer zone

💭 Think About

• Which option best describes a warning about targets that appear very close to own ship without prior tracking? • Does the inner guard zone mainly help with approach to CPA limits, or does it deal with objects that are already inside or just popping up near you? • Think about small, weak targets: would they more likely first appear in the outer zone or only be seen when they are already close in?

✅ Before You Answer

• Identify which choices describe something that could be done by either guard zone (not unique to the inner one). • Check which option specifically mentions targets that are first detected or initially detected within the inner area. • Verify which option is about preventing sudden close-range threats rather than general early warning at longer range.

Question 1 of 27070

Your ARPA has two guard zones. What is the purpose of the inner guard zone?

Guard against target loss during critical maneuvering situations

Alert the watch officer that a vessel is approaching the preset CPA limit

Sound an alarm for targets first detected within the zone

Warn of small targets that are initially detected closer than the outer guard zone

Question 1 / 2707066636ee928f7522a1c5191a0

Question 1 of 2707066636ee928f7522a1c5191a0

Your ARPA has two guard zones. What is the purpose of the inner guard zone?

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Question 1 of 27070

Your ARPA has two guard zones. What is the purpose of the inner guard zone?