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Questions tagged [terminology]

For questions about words, phrases and definitions that are specific to aviation or used in a different way in aviation.

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1answer
46 views

What are ARTCC, RCO and FSS and what are differences?

I am confusing what ARTCC, RCO and FSS. and also what do they do? Do they control air traffic by communicating with pilots? Also, do they offer WX information in air born?
22
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5answers
5k views

What exactly do “captain”, “pilot”, “co-pilot” and “first officer” mean?

I know the co-pilot sits beside the pilot. But it's not clear for me, who is the captain and who is the first officer? And where they are sitting during the flight? Who is in right seat and who is in ...
3
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2answers
65 views

What is a “sidestep landing” in an instrument approach?

I have never seen a sidestep landing on an approach plate. What is a sidestep landing and when I can chose this approach?
2
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2answers
112 views

Why are waypoints not named uniquely?

Waypoint names are not unique. Why ? This is unnecessary (it would be possible to use unique names only). It introduces potential for confusion. So why are duplicate waypoint names permissible and ...
0
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1answer
98 views

What is an “unsafe airline”? [closed]

Question: Is there any internationally accepted definition for what an "unsafe airline" is based on objective criteria (e.g. fatalities per million passengers) ? Or is there an international standard ...
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0answers
96 views

What is a “wet footprint”? [closed]

What does this aviation term mean ?
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2answers
187 views

What is a “natural flight loop”?

I'm roughly (edit: very well) familiar with flight simulation, but recently I came across a new term. In this brochure (scroll to the second page) by Airbus about flight simulators, they talk about ...
3
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0answers
189 views

Are QDM and QDR the same as 'inbound' and 'outbound' courses?

I'm about to take my last test to join an airline: the simulator. I've been told they ask to perform some QDR/QDM interceptions, as well as radial ones. About QDM/QDR: QDM: Magnetic course from the ...
5
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1answer
672 views

What is the difference between redundancy and fault tolerance?

What is the difference between redundancy and fault tolerance in the context of aviation ?
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1answer
165 views

Why is it common to speak of “Concorde” rather than “the Concorde”?

Suppose you researching a book on the history of Boeing B-17. Suppose you researching a book on the history of the Boeing B-17. Which of those sentences sounds more complete and correct? OK, so ...
27
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2answers
7k views

What is a rubber engine?

I hear it a lot in engine design , I think that belongs to some phase about we can change the engine parameters according to requirements but I am not sure about it.
2
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1answer
65 views

What do “azimuth window” and “compass switch” refer to in this accident report?

I recently read the accident report on BEA 548, but I'm unsure of some technical terms used on p. 4 of the report (p. 14 of the linked PDF): Apart from the probability that in the particular ...
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3answers
1k views

What does “out of trim” mean?

Our flight was delayed from takeoff because the captain reported it to be "out of trim". What does this mean?
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1answer
159 views

In the United States, are ultralights legally considered aircraft?

I sometimes here it stated that in the United States, ultralight vehicles are not legally considered to be aircraft. For example, Wikipedia used to state: In the United States ultralights are ...
0
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1answer
53 views

Is the National Aviation Authority the same as the Civil Aviation Authority?

Are the NAA (National aviation authority) and the CAA (Civil aviation authority) the same organisation? According Wikipedia it looks like they are the same organisation.
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1answer
326 views

What is the difference between microburst and windshear?

When I read about these weather phenomena, I find that both of them depict the same thing, and have the same actions to avoid. So why are they differentiated? http://www.myairlineflight.com/windshear....
5
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1answer
362 views

What is the meaning of HOT-1, HOT-2, CAM, etc., in cockpit voice recorder transcripts?

When reading the the written down recordings of CVR like here, for instance, it is common to see abbreviations like HOT-1, HOT-2 or CAM. I guess that CVR records multiple channels and the codes ...
4
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1answer
209 views

What are the fins near the tail of a helicopter called?

My young sons are very enthusiastic about helicopters and I am repeatedly asked to name parts of their model aircraft. I would like to do so correctly, but my research has not always given definitive ...
2
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1answer
57 views

How to call a cartesian (END) coordinate system, that is referenced in surrounding air?

I'm looking for the correct/usual terminology for a coordinate system, that is moving with the wind. I do calculations in a Cartesian East-North-Down (END) system. When taking wind into account I'd ...
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1answer
108 views

What are the radius of containment (Rc) and horizontal protection limit (HPL) and how are they related to Type Code?

In ICAO Document 9871 (Technical Provisions for Mode S Services and Extended Squitter) page 30 they have mentioned it in the form of a table. But they haven't explained HPL and Rc in detail.
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1answer
117 views

AN-hedral or Cath-hedral? [closed]

We normally hear of wing geometry with dihedral. Most commonly, when speaking of a wing with negative dihedral, we hear the term anhedral. As I recall the prefix "an" indicates "without". On a few ...
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3answers
528 views

Definition of “Rotation Speed” vs “Lift Off Speed” vs “Fly Off Speed”

Is rotation speed and lift-off speed ever used interchangeably? (AMENDED Question) Is lift off speed and fly off speed the same? (See supplemental info below) I thought I clearly understood the ...
2
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2answers
341 views

Why bother tracking TSN after an overhaul?

I've noticed that mechanics often like to keep track of "time-since-new" (TSN) on components that have already been overhauled. What would TSN matter when the component is tracked by TSO for ...
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4answers
3k views

What is the official term for a gas / petrol station for planes?

I'm talking specifically about small airports where they don't have the fancy equipment and they actually have to go to a specific place to refuel for example cars go to gas station / petrol station ...
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1answer
211 views

What is a CRM and what does it stand for? [duplicate]

I've always wanted to ask a pilot what a CRM was. Of course, I didn't really get lots of chances to ask pilots, no I thought of just asking here. What is a CRM and what does it stand for?
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0answers
144 views

Are the terms “Aircraft Version” and “Aircraft Variant” synonyms?

Related to the answer of the following question: How are evolution and variants of aircraft considered by certification authorities? Are the terms "Aircraft Version" and "Aircraft Variant" synonyms? ...
7
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1answer
201 views

What does “leave clear on its left” mean in UK regulations relating to collision avoidance on non-runway landings?

This doesn't seem to be plain English, could someone explain this with a simple example for me please? I'm not sure what 'Leave clear on it's left' means, and it's not clear whether the subject of the ...
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1answer
2k views

Is the term “guinea pig” defined in the Pilot/Controller Glossary?

Is the term "guinea pig" now or was it previously defined in the Pilot/Controller Glossary? If it's not defined in the Pilot/Controller Glossary, maybe it's in some other publication. I was flying ...
3
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2answers
687 views

Is there a difference between a chart and map?

Does the use or meaning of "chart" or "map" vary worldwide? Is there a difference between a chart and map?
2
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1answer
78 views

“right traffic pattern” vs. “right-hand traffic pattern”

Is it officially called "right traffic pattern" or "right hand traffic pattern"? I'm mostly interested in EASA terminology, but also FAA / other areas of the world. Background: After I always said "...
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1answer
123 views

What are heat detection sensors and how can they cause a speed error?

From this news article on Saratov Airlines Flight 703: A report handed down by Russian investigators has blamed human error for the crash of Saratov flight 703, saying the pilots didn’t switch on ...
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0answers
63 views

What does “lower flatness” mean in airfoil terminology?

What does lower flatness mean in these parameters of a Glenn Martin airfoil?
2
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1answer
102 views

What exactly are “clipped” wings?

What exactly does "clipped wing" mean? Been having a rather heated debate. My understanding is that clipped means the tips were removed after manufacture. The other party claims that if it was ...
3
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1answer
253 views

What does leading edge radius mean?

What does leading edge radius mean amongst these parameters of a st cyr 24 airfoil?
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1answer
209 views

What qualifies as a “takeoff” and “landing” in currency requirements?

I just met my night-time currency requirements at KONT. Landing and taking off from a 12000 foot runway in a Cessna 152 got me to thinking (always dangerous, I know). There's more than enough room ...
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2answers
698 views

What is the difference between a vertical stabilizer and a rudder?

I saw two questions on locating these surfaces ahead of CG: Vertical Stabilizer and Rudder How are these the same or different control surfaces?
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1answer
195 views

Why are some Tomahawk missiles' nose duck-nose shaped?

Why there is a duck-like shape in this Tomahawk missile's nose? I see this shape in most Tomahawk images; however, not every Tomahawk's nose is shaped like this. If it is an aerodynamic feature, ...
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1answer
222 views

What is a “slender delta” wing?

I am curious about delta wings. I read some articles and found the term "slender delta". Please help me to understand this term.
2
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1answer
99 views

What does “RA” mean in the FAA Terminal Constraints?

I'm trying to interpret the Terminal Constraints listed on the Operations Plan Advisory (https://www.fly.faa.gov/adv/adv_spt.jsp). RA seems to be used in the context of weather, but I haven't been ...
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2answers
334 views

What is the FAA definition of “takeoff” and “landing”?

This question is in the context of commercial flights with passengers. What is the definition of "takeoff" and "landing" phases? Does it include taxi? Is it from lift-off for takeoff? and touchdown ...
0
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1answer
169 views

Gage or Gauge? Which is correct in the aviation industry? [closed]

Gage or Gauge? Some official aviation sources seem to use the spelling "gage" whether referencing cockpit instruments or aircraft maintenance tooling. However, more broad English sources note that "...
40
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2answers
5k views

What does the letter G mean in a runway identifier?

Boulder Municipal Airport (KBDU) has runways 8 / 26 and also runways 8G / 26G. What is the significance of the letter G following the runway numbers?
2
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2answers
234 views

What is the relationship between the terms “airprox” and “near mid-air collision”?

Do the terms "Airprox" and "Near mid-air collision" mean the same? If not what is the difference between them?
2
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1answer
158 views

What is Arctic Control Area (ACA)?

I saw that in Jeppesen airway manual but I didn't find a definition for it. What is that? How to establish it? Who establishes it and for what reason?
6
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5answers
599 views

Is it incorrect to refer to a C-130 as a jet?

In this article by CNN, the C-130 involved in the unfortunate crash in Savannah, GA is referred to as a "jet." Is this considered proper usage? I'm not looking for public opinion here but official ...
9
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2answers
970 views

What does the FAA mean by “Make and Model” of aircraft?

Short Version: How does the FAA define the terms "make" and "model" in regulatory documents, particularly in the context of referring to pilot experience in aircraft? Long Version In 14 CFR 135—and ...
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3answers
168 views

What does “inertial” refer to in “inertial reference”?

An ADIRU makes use of air data reference and inertial reference. Inertial reference calculates the heading, position, ground speed and attitude. I was wondering why is it called inertial. Is it ...
9
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1answer
276 views

What is the english term for “vol en ficelle”?

From what I have read online and understood, "vol en ficelle" is basically a low altitude flight preparation method that requires calculating a set of altitudes to be followed in order not to crash. ...
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1answer
353 views

Why do we say “climb” and not “ascend”?

The term for moving to a lower altitude is "descending." Why, then, is the term for moving to a higher altitude "climbing" and not "ascending"? The latter goes better with the term "descending." Does ...
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2answers
139 views

Does the reference for AGL include obstacles?

Let's say a plane flies 10m above some trees, that themselves are 10m above the underlying ground. Would that be 10m or 20m AGL? Or, in more abstract terms: What exactly is the reference point for ...