Which statement correctly differentiates a Visual Fix from an Electric Fix?

• A. Visual Fix uses GPS data; Electric Fix uses LOPs only
• B. Visual Fix uses the intersection of LOPs with radar ranges; Electric Fix uses LOPs only
• C. Visual Fix is based on the intersection of LOPs from simultaneous observations; Electric Fix combines GPS or radar ranges with LOPs from simultaneous observations
• D. Visual Fix and Electric Fix are the same method

Answer: (C)

In navigation fixes, you determine your position by lines of position derived from observations made at the same time. A Visual Fix is built entirely from sighted observations of known objects: you plot lines of position from bearings to two or more landmarks obtained simultaneously, and the intersection of those lines gives your location. An Electric Fix, on the other hand, uses electronic data—such as GPS position information or radar ranges—to supply one or more lines of position, which are then combined with lines of position from simultaneous observations to arrive at the fix.

So the best statement captures that a Visual Fix comes from the intersection of LOPs from simultaneous observations of visible objects, while an Electric Fix involves GPS or radar ranges in combination with LOPs from simultaneous observations.