Which circuit corresponds to 4JV?

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

Answer: (B)

Circuits on Navy ships are identified by a location or group code plus a function code. The number shows the group or zone, while the two-letter suffix names the system served. In this scheme, the label 4JV points to the engineering side and to the fuel system specifically, so it maps to the Engineer's Circuit Fuel. That’s why this designation corresponds to the fuel circuit under the engineering department, rather than to electrical, bearing control, or maneuvering and docking circuits, which use different suffixes. When studying, use the ship’s circuit directory to familiarize yourself with which two-letter suffixes belong to which systems.