🔍 Key Concepts

• Typical capabilities of Electronic Plotting Aids (EPA) on standard marine radars • Difference between minimum required functions and maximum tracking capacity • How many simultaneous targets are practical to monitor on a typical watch

💭 Think About

• Think about how many moving targets a navigator can realistically monitor and assess for risk of collision at the same time • Consider what a reasonable design number would be for an EPA fitted to a standard commercial radar, not a high‑end ARPA system • Eliminate options that seem too low to be useful or unrealistically high for a basic aid

✅ Before You Answer

• Which choice would allow tracking of multiple nearby vessels in a busy harbor or traffic lane? • Which number seems consistent with a basic aid, not a full ARPA (Automatic Radar Plotting Aid) system? • Verify which option is commonly cited as the standard tracking capacity for EPA questions in licensing exam study guides