What circuit is 1JG?

• A. Ship Control Bearing Circuit
• B. Engineers Circuit Fuel
• C. Aircraft Control Circuit
• D. Maneuvering and Docking Circuit

Answer: (C)

In Navy sound-powered telephone systems, circuit designations are built to reflect function. The starting number identifies the general system area, and the letters that follow point to the specific circuit family within that area. The designation 1JG is assigned to the Aircraft Control Circuit, which handles communications related to flight deck operations and aircraft handling.

That’s why it’s the best choice: it directly maps to the aircraft control role, essential for coordinating aircraft on the flight deck, the Air Officer, deck control, and related operations. The other names correspond to different shipboard functions—bearing and ship control, fuel systems for engineers, and maneuvering/docking—each with its own distinct circuit designations.