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Chapter 1 Homework Questions
1. The chart projection used for U.S. coastal areas is:
2. An advantage of the Mercator projection is:
a. physical features lose much of their relative shape.
b. it shows the earth as seen from space.
c. lines of latitude and longitude are at right angles to each other.
d. lines of longitude curve as they do on the globe.
3. When comparing a land mass at a latitude of 70°N on a Mercator chart with a comparable size land mass near the equator, the:
a. land mass at 70°N will appear smaller.
b. land mass at 70°N will appear larger.
c. two land masses will appear to be the same size.
d. land mass at 70°N may appear larger or smaller depending on longitude.
4. Polyconic projections are useful especially when traveling over great distances.
5. Polyconic projections have no distortion as to size.
6. On a Polyconic projection, the parallels of latitude are straight lines.
7. In planning a cruise, the steering error that can be expected under normal weather conditions is:
a. between 0° to 1°.
b. between 3° to 5°.
c. between 6° to 8°
d. greater than 9°.
8. The smaller your boat's compass, the easier it is to read.
9. One of the most important advantages of pre-plotting a cruise is that it tells you:
a. the height of tide along the way.
b. expected weather conditions.
c. areas of hazard to be avoided.
10. When underway in waters near land, it's best to plot GPS fixes and time every:
a. 4 to 5 hours.
b. 2 to 3 hours.
c. hour or so.
d. never - GPS does not require plotting fixes.
11. Raster formatted digital charts:
a. have less detail than paper charts.
b. have the look and feel of traditional paper charts.
c. are easily stored on chips or cartridges.
d. are always used with chart plotters.
12. Vector formatted digital charts:
a. have the look and feel of traditional paper charts.
b. require more memory than raster charts.
c. store printed information as a series of pixels.
d. are easily stored on chips or cartridges.
13. Digital charts are less accurate than traditional paper charts.
14. Using the zoom function on a digital chart increases the precision of detail.
15. Chart scale is a factor in determining the accuracy of a digital chart, therefore:
a. a large scale chart covers a large area with little detail.
b. a large scale chart covers a small area with great detail.
c. a small scale chart covers a small area with great detail.
d. a small scale chart covers a large area with great detail.
16. The use of a Chartplotter requires:
a. no input from a GPS.
b. interpretation and additional plotting on the display screen.
c. shielding from direct sunlight.
d. input from a digital chart to activate the display.
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