Taking for example the attached image, when looking at the ocean floor, there appears to be areas (strips, some of which I have drawn red lines by) of greater detail. Is this accurate detail? From ships that have passed over the area?
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Those are bathymetric survey tracks.
The survey artifacts are very straight and regular in character, compared to geological features. What you're seeing is an increased level of detail along the survey line, which contrasts with the relatively smooth background model.
I labeled some of the features in this answer to a related question:
NOAA Reference: Did I find the lost underwater civilization of Atlantis?
Those are the only places we have actually scanned the sea floor in detail; ergo, they are the only areas on your map that are pseudo-accurately detailed. The rest we simply infer, nobody has ever even scanned, never-mind explored, the rest of that surface area.