1. Geographical horizontal datum is:
a) the same for all points on the earth
b) angles clockwise direction from true north
c) the water level used as a reference with respect to sea level.
d) an agreed-upon reference system used to determine positions relative to other locations.
Answer:

2.A vessel's heading is:
a) the direction the boat is travelling through the water
b) the direction the boat is travelling over ground
c) the direction the vessel is pointing
d) none of the above
Answer:

3. The Global Positioning System uses a horizontal datum called
a) WGS 83
b) NAD 27
c) WGS 84
d) NAD 84
Answer:

4. Geographical position is generally given in terms of:
a) latitude and longitude
b) fixed landmarks
c) the position's latitude
d) the position's altitude
Answer:

5. Some GPS receivers have a page showing a compass which indicates direction:
a) and this can be used to correct the ship's compass for deviational error
b) but the accuracy is insufficient to be used for navigation
c) to an accuracy of less than .10 error in either true or magnetic
d) accurately only when the vessel is moving at a constant speed
Answer:

6. The constellation of satellites required by a GPS consist of a minimum of:
a) 24 satellites in 24 hour orbits
b) 18 satellites in 12 hour orbits
c) 18 satellites in 24 hour orbits
d) 4 satellites in 4 hour orbits
e) none of the above
Answer:

7. Cross track on a GPS receiver refers to:
a) the error generated due to the heeling effect of your vessel if the antenna is mounted too high.
b) your distance right or left from the desired track
c) the intercept angle between heading and course over ground
d) the amount of leeway of your vessel
Answer:

8. After your GPS "locks in", geographical position is given at:
a) 1 second intervals
b) 5 second intervals
c) intervals at a minimum of 1 each minute
d) only those times when the vessel is moving
Answer:

9. With GPS receivers without WAAS or DGPS have a dilution of position DOP probable accuracy of:
a) depending on the number of channels in your GPS
b) 100% unless Selective Availability SA is in effect
c) 3 metres 95% of the time
d) 15 metres 95% of the time
Answer:

10. A GPS receiver can safely be used in conjunction with a chart if
a) the chart datum is NAD 83
b) the GPS is set to NAD 27
c) the GPS datum is left at WGS 84
d) the GPS datum is set to be the same as the chart datum
Answer:

11. After a route is installed in a GPS and it is activated the GPS calculates and displays:
a) the heading to steer to the next waypoint
b) the required course, distance and the ETA to the next waypoint in the route
c) the distance and ETA to the final waypoint position in the route
Answer:

12. Electronic fixes should be placed on a chart from the GPS:
a) at least once every hour or less
b) at the end of each leg of the route
c) only if necessary since the GPS accuracy is better than mauual fixes
d) when requested by the skipper
Answer:

13. On a sailboat, a fixed external GPS antenna should ideally be mounted:
a) as high as possible to increase the pickup of received signal
b) low enough to minimize the effect of roll, with the clearest possible view of the horizon
c) as close as possible to the radar antenna so that information matches the position shown on the radar screen in an integrated system
d) under the bimini to minimize the effect of rain and fog on the received GPS signal
Answer:

14. GPS electronic navigation systems determine speed (velocity) by:
a) means of input provided from the vessel's knotmeter
b) reference to the time and distance travelled between GPS fixes
c) means of the internal variation tables included in the GPS computer
d) reference to the initialization provided by the operator
Answer: