What type of electrical diagram for the electrical distribution system is shown in the illustration? Illustration EL-0014

Correct Answer: Option C — The diagram is a one line diagram.

A one-line diagram simplifies complex three-phase marine power distribution systems down to single lines and standard symbols. Governed by IEEE 45 and 46 CFR Subchapter J, these diagrams are mandatory on vessels to show generators, switchboards, feeders, and protective devices clearly during casualty operations.