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39 Cards in this Set
- Front
- Back
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For navigational purposes, the earth is assumed to be a ______. |
perfect sphere |
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what is defined as a circle on the surface of a sphere who center and radius are those of the sphere itself? |
great circle |
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What is the shortest distance between two points on a sphere? |
arc |
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what is the circle on the surface of the earth whose center and or radius are not that of the sphere? |
small circle |
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What are lines of latitude (run ____ and ____ ) used to measure? |
east ; west ; degrees of latitude N or S of the equator |
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The "Prime Meridian" measures from ____ to _____ . |
0 degrees ; 180 degrees |
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The earth rotates at a rate of how many degrees an hour? |
15 degrees |
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what are the four times zones in the United States? |
Eastern ; Central; Mountain; Pacific |
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since pilots have to often cross several times zones during a flight, what was established? |
Coordinated Universal Time (UTC) |
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UTC is the time at the ___ line of longitude which passes through _______ , England. |
Greenwich |
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What is the 180th meridian named? |
International Date Line |
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if you cross the international dateline westbound, what occurs? |
Add a day |
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by using the meridians, direction from one point to another can be measured in ______ in a clockwise direction from ______? |
degrees ; true north |
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A compass rose is graduated in how many degrees? |
360 |
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what is the associated degree with north? |
360/000 |
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What is the associated degree with West? |
270 |
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what is the direction in which the nose of the aircraft points during a flight when measured in degrees clockwise from true north? |
true heading (TH) |
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what is the angle between true North and magnetic north? |
Variation |
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what connects points of equal magnetic variation? |
isogonic lines |
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The line connecting points at which there is no variation between true north and magnetic north is the _____ line. |
agonic |
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what is defined as the heading of the aircraft read from a magnetic compass and differs from magnetic heading by the amount of deviation? |
compass heading |
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True bearing is measured from ______. |
true north |
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what is the definition of distance? |
A spatial separation between two points |
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what is the distance of a nautical mile? |
6067 feet |
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What is a NM used in conjunction with? |
airspace, separation, and airborn operations |
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what is the distance of a statue mile? |
5280 feet |
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What is a SM used in conjunction with? |
visibility |
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What is, the clockwise angle in degrees from the nose of the air craft measure clockwise, called? |
relative bearing |
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TV MAKES DUMB CHILDREN |
TH(+or-)VAR=MH(+or-)DEV=CH |
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THINKING HARD REALLY BURNS THE BRAIN |
TH+RB=TB |
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what is the speed of an aircraft relative to its surrounding mass? |
Airspeed |
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what is the speed shown on the aircraft airspeed indicator? |
Indicated airspeed |
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what is used primarily in flight planning and en route portion of flight and is the airspeed of an aircraft relative to undisturbed air? |
true airspeed |
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what is the speed of an aircraft relative to the surface of the earth and is affected by wind conditions aloft? |
Ground speed |
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who are the varied owners of air navigational aids? |
FAA and military services |
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What does radio navigation provide? |
Provides pilots with position information from ground station |
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What is, transmission and reception of electronic impulses or signals through space by means of electromagnetic waves? |
radio |
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What is the radio frequency range? |
3 kHz to 300 gHz |
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What is the useable radio frequency range? |
10 kHz to 100 gHz |
