Position 05 Flashcards
Directions on the earth are made from an origin/ datum called?
The prime meridian
Indicating a position on the Earth by reference to a graticule that covers the glove. True or False?
True.
Define latitude.
The angular distance from the equator to a point measured north/southwards along the meridian through that point.
Parallels of latitude_______ the earth and are _______ in degrees ______ or _______ the equator up to a maximum of _______________
Circle Expressed North South 90 degrees
Vertical lines of longitude are referred to as ?
Meridians
The uk mainland lies between which parallel of latitude?
50-59 degrees
Meridians of longitude are up to a maximum of?
180 degrees
What meridian of longitude does the uk mainland lie between?
7 west and 2 east
The shorter angular distance along the ______ between the ______\______ and the meridian through that point expressed in degrees east or west or a reference known as the prime meridian up to a maximum of ___________
Equator
Prime meridian
180 degrees
Which one comes first longitude or latitude
Latitude proceeds longitude
In aviation the letters proceed the number and the longitude has 7 numbers while latitude has 6. The last 4 give minutes to within two decimal places.
👍
List the 3 other ways to report Position.
Published waypoint
Beacons
VOR/DME- Position in range and bearing.
What are the two common scales of ordnance survey maps?
1: 25,000 (Walkers)
1: 50,000 (Emergency Services)
Where is the true origin on an ordnance survey map?
Bottom southwest corner
What are the areas of the 3 ordinance survey maps?
2500km x 2500km
500km x 500km
100km x 100km
References in regards to ordnance survey scales can be referenced in 4 figures - accurate to 1000m 6 figures- 100m 8 figures - 10m 10 figures - 1m
True
What is ground position?
Position on the ground directly beneath the aircraft at a given time
How can you visually determine a position?
1) pinpoint: identification by direct observation
2) Fix: use of bearings and position lines
What is dead reckoning position?
The assumed position of the aircraft based on calculations; deduced from wind forecasts.
Define Bearing
The horizontal direction of an object, measured in degrees clockwise from the direction of north at the pilots position is the bearing of an object.
Define relative bearing
The horizontal direction of an object from the aircraft is measured in relation to the forward axis of the aircraft.
Heading + relative bearing = true bearing.
True or False?
True
What is a position line?
A line drawn on a chart a long which an aircraft is known to have been at a certain time.
What are the two types of position lines?
Single position line
Circular position line
Position lines obtained by radio aids are called
Radio position lines
What equipment is used for obtain bearing?
VDF
VOR
ADF
What equipment is used for range?
DME
What is a fix?
The intersection of 2 or more position lines obtained simultaneously.
Position lines should cross at what angle?
90 degrees but not less than 60.
What is a graticule?
Method of indicating position on the earth
A graticule is one degree of longitude at 60 degrees latitude. What is the width of the graticule?
30nm
One degree of longitude at the equator, what width is the graticule?
60nm
