Nav 02 Flashcards
02 How many CT-142 does 402 Sqn have?
4
02 What is air navigation?
The art of directing an aircraft from one position to another, and of determining the position of the aircraft over the earth at any time.
(In other words: finding out where you are, where you should be, and how to match the two)
02 What is the Earth shaped like?
An oblate spheroid. An oblate spheroid is a symmetrical body with a ‘bulge’ in one axis compared to the other (equatorial diameter is longer than the diameter from pole to pole).
02 What are the radii at the equator and the poles?
6378 km and 6356 km
02 What is a great circle?
A circle on the surface of the earth whose centre and radius are those of the sphere itself. A great circle divides a sphere into two equal hemispheres. It is also the shortest distance (along the Earth’s surface) between two points.
02 What is the equator?
A great circle on the surface of the Earth whose plane is perpendicular to the Earth’s axis of rotation.
02 What is a small circle?
A circle on the surface of the earth whose centre and radius are NOT those of the sphere itself. All circles on the surface of the Earth that are not great circles are small circles.
02 What is a parrallel?
A small circle on the surface of the Earth whose plane is parallel to the equator.
02 What is parrallel latitude?
Angular distance from the equator measured along a meridian. Angular distance from the equator measured along a meridian. Units are Degrees° Minutes’ Seconds”. Winnipeg Intl is at 49°54’36”N.
02 What is the meridian?
A semi-Great circle on the surface of the Earth joining the poles of the Earth. All meridians converge at the poles.
02 Where is 0 degrees longitude found?
Greenwich was chosen as the prime meridian in 1884 at the International Meridian Conference, defines 0° longitude.
02 What is a rhumb line?
A regularly curved line on the surface of the Earth cutting all meridians at the same angle. A Rhumb line is used to allow a path of flight to be a straight line on some maps. (Eg Mercator projections). When flying a rhumb line the heading remains constant whereas if flying a great circle constant heading changes are required.
02 What is a nautical mile?
Length of an arc on the surface of the Earth subtending 1minute. (1/60th of a degree) at the centre of the curvature of the place. 6080ft
02 What is a statute mile?
An arbitrary unit of measurement which was set by law (ie a statute) in 1593 at 5,280 feet.
02 What is a statute mile equivalent to? (in km or NM)
66 Nautical Miles = 76 Statute Miles = 122 km
