Chart Navigation & Plotting · Chart Scale
A chart with a scale of 1:20,000 compared with one of 1:80,000 is a:
- ALarger-scale chart showing a smaller area in greater detail✓ Correct
- BSmaller-scale chart showing less detail
- CChart covering the same area
- DChart with no usable detail
Explanation
The larger the representative fraction (1:20,000 > 1:80,000), the larger the scale, the smaller the area covered, and the greater the detail. Harbor charts are large-scale; coastal/sailing charts are small-scale.
Authority: NOAA charts; Bowditch (Pub. No. 9)
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