Navigation: General Flashcards
What is a meridian?
What is the prime meridian? Where is it located?
Lines of longitude (semi great circle) running north south connecting earth’s true poles.
The prime meridian is a longitude of 0 degrees and it passes through Greenwich England
What is the international date line? What happens to the days at this line of longitude?
It is the opposite of the prime meridian, it is where day officially changes from one to the next
Meridians are measured north and south of the prime meridian. True or false?
False, they are measured east and west
one hour of time is also equal to __° of Longitude.
• The earth rotates __° in an hour, one time zone.
15
15
How is a parallel of latitude measured?
Parallels of Latitude are measured north or south of the Equator.
1 minute latitude equals __ NM
Is longitude the same?
1
To an extent, it is 1 NM at the equator, but as the meridians converge to zero at the poles, the distance decreases as you go north or south from the equator
One nautical mile is ____ feet
6080
What is the equator in terms of latitude?
What degree is it?
What is the circumference of the equator?
It is the line of latitude that is equidistant from each of the poles.
0 degrees
24,000 miles
• The Equator is both a Great Circle and
Rhumb Line.
True or false?
True
What is a great circle?
This is a circle on the surface of a sphere whose plane will cut the sphere into two equal pieces.
What is a rhumb line?
a curved path that an aircraft takes when it maintains a constant compass direction or bearing relative to true north
All parallels of latitude are rhumb lines,
True or false?
True
What is an advantage of following a rhumb line? What is a disadvantage?
Advantage is you can maintain a constant heading
Disadvantage not the shortest route
What is magnetic variation?
The angle between the magnetic meridians and the true meridians
What are isogonic lines?
Dashed lines on a map that represent the same amount of magnetic variation
What is an agonic line? Where is it located?
where the geographic pole and the magnetic pole line up giving zero magnetic variation.
It moves but is currently west of Thunder Bay
What is magnetic deviation?
What are ways it can be compensated for?
-Due to the magnetic fields associated with the metal and radio equipment in an aircraft the compass may not point directly to the North Magnetic Pole.
-it may be corrected with a correction magnet, compass correction card, swinging the compass which could say ie. for 090 steer 093 etc
What is track?
• The track is the direction an aircraft intends to travel over the ground.
• The intended track may be represented by a straight line drawn on a chart.
• Track is the angle between this line and a meridian measured clockwise through 360°.
What is track made good?
The track made good is the actual path travelled by the aircraft over the ground.
• Like the intended track it may be represented by a line drawn on a chart and (provided it is a reasonably straight line) its direction measured from a true or magnetic or compass north.
What is heading?
What is a factor that can differentiate heading from track?
the direction the aircraft’s nose is pointed in relation to true or magnetic north.
• When creating a Nav Log we will usually start out with the TRUE heading and then correct to MAGNETIC heading by correcting for Variation and then Deviation to get compass heading.
Wind strength and direction can influence our heading
What is airspeed?
Indicated airspeed?
True airspeed
speed through the air.
• Indicated airspeed is the airspeed that is read of the airspeed indicator.
• True airspeed is calculated based on positional error, altitude, and temperature.
What is ground speed?
What will be the relation to the airspeed if there is zero wind?
Head wind?
Tail wind?
This is our speed relative to the ground.
• The speed and direction of the wind will alter the ground speed.
Zero wind- air and ground speed the same
Headwind- lower ground speed
Tailwind - higher ground speed
What is bearing?
an object’s direction as measured clockwise from a meridian.
What is drift?
How to compensate?
Wind blowing from the left or right will cause the aircraft to drift away from its intended track.
Need to crab into the wind
What is air position?
This is the theoretical position of an aircraft at a given moment assuming it to have been unaffected in flight by wind.
• The position the aircraft would have reached without allowing for wind.
Also known as no wind position
latitude is the same as longitude turned over 90 degrees.
True or false?
False
The purpose of swinging the compass is to correct for
a.deviation.
b.variation.
c.bearing drift.
d.geographic procession.
A
The shortest distance between two points is designated by
a.a Great Circle.
b.a Rhumb Line.
c.a meridian.
d.an Isogonic Line.
A
A pilot wishes to fly directly north along a Semi Great Circle line. The magnetic heading required to do this, as seen on a heading indicator, would
a.change throughout the flight due to variation.
b.change only due to bearing drift.
c.not change as the Semi Great Circle crosses the longitudes at the same angle.
d.change as the Semi Great Circle does not cross the longitudes at the same angle.
A
How often is the CFS published?
Every 56 days
The CFS contains a comprehensive listing of
a.all waterdromes.
b.all aerodromes.
c.all registered aerodromes.
d.all of the above.
C
What are a few examples of aeronautical charts?
> VNC
VTA
CFS
WAS
DAH
LO
HI
CAP
What is a VNC?
What are the straight lines on this map referred to?
What is the scale?
How often are they updated?
VFR Nagvigation Chart
They are called great circles
1:500,000
Usually updated every 2 years, if there are changes between then, a NOTAM will be issued
What is a VTA?
What is a straight line drawn on these charts?
What is the scale?
How often are these updated?
Where can you check if you have the most recent/valid chart?
VFR Terminal Area Chart
A rhumb line
Scale is 1:250,000
Usually every 2 years
You can check nav Canada in the aeronautical information products, then the NOTAMS, as well as the CFS
What is a LO chart?
What are the straight lines?
What does this chart show?
How long are they valid for?
Used by IFR pilots a lower altitudes below 18,000 ft
Great circles
It shows radio aids, airports, and other POI’s but no topographical features.
They are valid for 56 days
What is a HI chart?
What is the straight line on this chart?
What does it show?
Validity period?
IFR flights AT 18,000 ft ASL and above
Great circle
Shows the same as a LO chart
56 days, same as LO
What is the CAP? (Canada air pilot)
Validity period?
The information is pertinent to IFR arrivals and departures, instrument approaches, etc
Valid 56 days
What is the WAS?
Validity period?
Water aerodrome supplement
Contains all water aerodromes shown on VFR charts
Re issued annually
What is the DAH?
What can you find in it?
Validity period?
Where can you find it?
Designated airspace handbook
It answers the question of who to contact for special use/restricted areas, etc
56 days
Free pdf download online
Two airports on a VNC are two inches apart from each other. Roughly what distance are these airports apart?
a.2 SM
b.32 SM
c.16 SM
d.8 SM
C