Navigation Flashcards
True/false: When you cross the international date line flying westwards, one day is substracted from your date
False. Crossing the international date line westwards adds a day, whereas crossing eastwards substracts a day
How many knots are in 3 SF (speed factor)?
180 kts (60 kts in 1 SF)
The pressure at MSL (mean sea level) is 1000 hPa. If we climb to an altitude of 900 ft, what is our local pressure?
Approximately 970 hPa
Using 1 hPa per 30 ft:
900/30 = 30 hPa
1000 - 30 = 970 hPa
The 4 intercardinal points are: …
North, south, east and west
How many NM are between the following two positions
1: 42°18’N 153°59’E
2: 18°32’S 153°59’E
3650 NM
Remember that:
1° = 60 NM
1’ = 1 NM
What is a great circle?
A great circle is the path between two points on the globe with the shortest distance
What is a rhumb line?
A rhumb line is the path between two points on the globe where the azimuth is constant
True/false:
On a Lamberth conformal conic projection map, a rhumb line will be a curved line, whereas a great circle will be a straight line
True
True/false:
On a Cylindrical/Mercator projection map, a rhumb line will be a curved line, whereas a great circle will be a straight line
False. A rhumb line will be a straight line, whereas a great circle will be a curved line
If the IAS is kept constant, the TAS will (increase or decrease?) with an increase in altitude
Increase
If an aircraft is flying at 208 kts TAS, and the aircraft has a direct tailwind of 19 kts, what is the GS?
227 kts
What is navigation?
The art and science of determining the position of a ship, plane or other vehicle, and guiding it to a specific destination.
What are the three levels of organizational planning?
Strategic = long term
Tactical = short / medium term
Operational = Day to Day
On what level of organizational planning does ATC use navigation?
Primarily on the operational level, have the focus on guiding aspect
What is the tilt of the eart?
23,5 degrees
What gives us the seasons?
The tilt of the earth.
What is civil twilight?
Civil twilight ends in the evening when te centre of the sun’s disc is 6 degrees below the horizon and begins in the morning when the centre of the sun’s disc is 6 degrees below the horizon.
At which longitude do we find Greenwich Meridian Time / UTC?
0 degrees
What do we call the “anti-meridian”?
The International Date Line
Are latitudes always the same length?
No, they get shorter towards the poles.
How many seconds are there in 1 degree latitude? How many NM is this?
3600 seconds
= 60 minutes is equal to 60 NM
Is the distant between the same longitudes always the same if you move North?
No, the distance becomes smaller if you move North and depends on the latitude on which it is measured.
What is the reference system for the GPS system?
WGS84 = World Geodetic System 1984
What do we call the shortest distance you can fly between two points on eart?
A great circle.
Where is True North located on earth?
Where the longitudes converge.
Geographic north
To which north is the compass pointing?
Magnetic North
What do we call the lines on a chart that show the pattern of Magnetic declination (variation)?
Isogonic lines