Random 2 Flashcards
Name two advantages and disadvantages of the FMS.
Advantages
• Workload reduction for pilots.
• Computer generated efficiency profiles more accurate.
• Increased navigation accuracy due to cross referencing.
• Improves situational awareness.
Disadvantages
• Reliant on pilot input.
• Intricacies of system can lead to
misinterpretation or erroneous data entry.
•Loss of situational awareness as pilots may become too involved in operating and monitoring the system that they forget to look outside.
• Expensive.
What are great circles?
Lines of longitude that run from North to South. All meridians including the prime meridian with the exception of the equator (which runs from east to west)
Which means of navigation best optimizes the use of airspace?
Required Navigation Performance. (RNP)
How many minutes in a degree?
60 minutes
What are small circles?
Circles produced through any part of the sphere other than the centre. All lines latitude (East to West) with the exception of the equator.
What are the four main components of the FMS?
1) Automatic flight control/ Automatic guidance Systems. (AFCS/ AFGS)
2) Flight Management Computer. (FMC)
3) Air Navigation System. (AN)
4) Electronic Flight Instrument System. (EFIS)
Why are great circles important in navigation?
Great circles represent the shortest distance between two points on a sphere. It allows pilots to save time and fuel.
What is the range of meridians of longitude an parallels of latitudes?
Lines of longitude: 0° to 180°
Lines of latitude: 0° to -90° (south) and 0° to +90° (north)
What is Performance Based Navigation (PBN)?
(An inefficient for of ) Navigation from a position relative to ground based nav aids (DME, VOR, NDB) to a position relative to another navaid.
The imaginary line that separates one day from another at 180° longitude is called?
The International Date Line.
How many minutes does it take for the sun to move from one degree of longitude to another?
4 minutes.
How many degrees does the earth rotate every hour?
15 degrees.
What is UTC?
Universal Coordinated Time is a highly accurate time standard that is synchronized with the Earth’s rotation and used globally to determine relative local times.
What is a Nautical Mile?
A NM is the length of the arc of a great circle that subtends an angle of one (1) minute at the centre of the Earth. It is based on the circumference of the planet Earth.
When giving coordinates which goes first longitude or latitude?
Latitude (N - S) goes before Longitude
(W - E)
