Which code corresponds to the captain's battle circuit?

• A. JA
• B. JB
• C. JC
• D. JD

Answer: (A)

In this type of question, the labels on a ship’s electrical diagram are defined by a legend. Each two-letter code corresponds to a specific circuit, and the captain’s battle circuit is given its own unique code in that legend. The code that matches the captain’s battle circuit in the legend is the one you’d select because it directly identifies that circuit on the diagram. Here, the legend assigns the captain’s battle circuit to the code labeled JA, so it’s the correct match. The other codes designate different circuits or control areas as defined by the legend, so they don’t correspond to the captain’s battle circuit. Always verify with the diagram’s legend to confirm the exact mapping.