1. The GPS satellite navigational system developed by the US Department of Defense provides:
a) precise navigational coverage of the entire world
b) continuous three-dimensional positioning information
c) positioning information to both military and civilian users
d) All of the above
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2.GPS receivers use signals from:
a) Two or more satellites
b) Four or more satellites to give three-dimensional positions
c) Satellites to produce accurate positions only when located on the water
d) None of the above
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3."Acquisition time" refers to the length of time required by a GPS receiver to:
a) receive a signal from a satellite
b) "lock onto" satellite signals after power is applied
c) begin to provide accurate three dimensional positioning
d) both b) and c) are correct
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4. The "signal strength bars" and "Sky view" image produced by some GPS receivers
a) Indicate the signal strength received with different cloud conditions
b) Give and indication of what satellites are "visible" to the receiver
c) Indicate which satellites are being tracked
d) Both b) & c) are correct
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5. The sky view's outer circle represents.
a) The position of each visible satellite
b) The horizon (north up)
c) Only points which are greater than 45 deg. above the horizon
d) The limits of the GPS receiver's selectivity
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6. Datum errors can occur if the operator does not know that
a) NAD 27 is the same as WGS 84
b) NAD 83 is equivalent to WGS 84
c) NAD 27 refers to the early references used when surveying areas such as Georgian Bay
d) None of the above is correct
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7. Differential GPS (DGPS) is a correction system which
a) uses radio signals to provide correction values to be applied to the GPS positions
b) is used to correct for datum error
c) indicates how far a vessel is away from its NAD 27 datum position
d) is the same as WAAS (Wide Area Augmentation System)
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8. The key factors involved in selecting a GPS receiver are:
a) Cost and the number of options
b) Intended application, display capability, user interface to other navigational instruments
c) Number of channels, power consumption, and frequency range
d) None of the above is correct
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9. Since sailboats often tack and power boats tend to steer directly to their destinations:
a) Having a GPS with a large display will be more important to sailboats.
b) Having a GPS which provides SOA (Speed of Advance) is more important to sailboats
c) SOG is the same as VMG and is more important to power boats
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10. Perhaps the best criteria to use when selecting a GPS is.
a) the nature and size of the display
b) the number of items displayed simultaneously on the screen
c) the complexity and number of keystrokes required to bring up a display
d) All of the above items are quite important
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11. The three major sources of error in GPS positioning are.
a) Operator error, SA, and receiver design
b) Datum errors and cartography references, ionosphere propagation error and SA
c) Datum errors, operator errors and cartography references
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12. A GPS sensor is a receiver which:
a) Is often without controls or display screens
b) Is intended to provide data output for displays on some other piece of equipment
c) Merely receive and process GPS signals, then transmit the information to RADAR, chart plotters & various types of electronic displays
d) All of the above.
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