What distance is represented by 1 minute of latitude difference, measured along a meridian
1nm
Given the ratio 1:1852, what distance unit conversion is this?
Nautical miles to kilometres
The length of one minute of arc along a meridian is equal to which latitude approximately
45 degrees
The distance between geodetic parallels of latitude on the surface of the wgs 84 ellipsoid…
Increases with increasing latitude
As latitude increases from the equator to the poles:
The ellipsoid becomes more sharply curved toward the pole.
This curvature change causes the surface distance corresponding to a 1° change in latitude to increase.
The diameter of the earth
360 degrees x 60NM = 21600NM
21600x 1.852 = 40,003.2 km
40003.2 / pi =12,700km
The circumference of the earth is
60NM x 360 degrees = 21600NM
What combo of flight level and headwind gives the greatest distance between air distance and ground distance
High flight level and high headwind
Formula for finding air distance
Ground distance x TAS/GS
What’s the relationship between air distance and ground distance with a headwind
Air distance is greater than ground distance
What’s the relationship between air distance and ground distance with a tailwind
Ground distance is greater than air distance
An aircraft is cruising at FL400 in zero wind conditions. What is the relationship between air distance and ground distance between two positions on the ground
The air distance is slightly greater than the ground distance as TAS is greater at higher altitudes
What to do if 2 points are reciprocals/ anti meridians ( longitudes add to 180 on opposing hemispheres) and want distance
Distance from one point to pole + distance from other point to pole
What is the only true great circle on the surface of the WGS-84 ellipsoid
The great circle that is coincident with the equator
What’s an isogonic line
Line over the surface of the earth upon which magnetic variation is constant
What’s an agonic line
An isogonic line upon which magnetic variation is zero
Where is there an atomic line running to/from
The agonic line follows seperate paths out of the north polar regions and there’s currently one running through Western Europe and the other through the USA
What’s the acronym for true heading magnetic heading compass heading deviation and variation
Cadbury’s Dairy Milk Very Tasty
Compass Heading + Deviation = Magnetic Heading
True Heading + Variation = Magnetic Heading
