INRAT Flashcards
Where is a clearance or an instruction valid?
Only in a controlled airspace
Which is the T° range in which an aircraft is most likely to be struck by a lightning?
Between -5°C and +5°C
How can you obtain better information from your on-board weather radar (for example when you’re flight in moderate rain)?
Use the tilt control to move the radar’s antenna angle on the vertical plan
How does a DME work?
The DME device in the aircraft measures the time interval between two signals :
- an interrogating signal
- a matching ground signal sent as a reply
These two signals have different frequencies.
What is the accuracy of the DME?
+/- 0,5NM or 3% of the displayed distance (whichever is greater)
Formula for time to NDB?
Time elapsed (in seconds) / relative bearing change (degrees)
Formula for distance to NDB?
( GS x Time to NDB in min ) / 60
What is the recommended procedure when flying into a TS?
- Slow down to turbulence penetration speed
- do not maintain rigid airspeed or altitude
- keep your present heading (so you don’t stress the aircraft structure)
How long an altimeter setting can be considered usable/current?
Up to 90 minutes.
However, care should be exercised if AS is older than 60 minutes.
How can you calculate your rate of climb in function of the climb gradient you need and your groundspeed?
RoC = ( Climb gradient x GS ) / 60
What are the requirements for 1,000ft-on-top IFR flight?
- Flight is conducted at least 1,000ft above all cloud, haze, smoke or other formation
- Flight visibility above the formation is at least 3 SM
- The top of the formation is well defined
- Appropriate altitude regarding direction of the flight is maintained
- The 1,000ft-on-top has been approved by ATC
- Aircraft will operate in Class B, C, D or E
What is the range of an ILS localizer?
35° on each side of RWY CL, on 10NM.
Then 10° on each side of RWY CL, on another 8NM (18NM total)
What are the radius, in regard of the aircraft category, for a visual manoeuvring area (for circling approaches)?
Cat. A = 1,3 NM Cat. B = 1,5 NM Cat. C = 1,7 NM Cat. D = 2,3 NM Cat. E = 4,5 NM
AIM RAC 9.23
How does frontal fog form?
Usually at a warm front, the precipitation coming from warm air saturates the cold air, creating frontal (or precipitation) fog.
How does a VOR work?
By measuring the phase difference between two transmitted signals.
What is the max deflection of a CDI when used with GNSS?
Enroute mode : +/- 2 NM with WAAS, +/- 5 NM without WAAS
Terminal mode : +/- 1 NM
Approach mode : +/- 0,3 NM
Definition of a touchdown zone
First 3,000ft or first 1/3 of a RWY, measured from the threshold, whichever is shorter.
What is governing T/O decision in IFR?
- RVR
- Ground visibility provided by ATC (or when RVR is fluctuating above and below minima)
- Visibility determined by the pilot
What is governing approach minima in Canada?
Approaches are governed by RVR.
What is governing landing decision in Canada?
DH for precision approaches (ILS)
MDA for non-precision approaches (all others)
What does BPOC mean?
Before Proceeding On Course
What are the SPEC VIS regarding the category of aircraft?
Category A : 1 SM
Category B : 1 1/2 SM
Category C and D : 2 SM
Which conditions do you have to comply with to be able to follow a departure procedure?
35ft above opposite threshold (departure end of the RWY)
Maintain RWY HDG to 400ft AAE before turning
Maintain a min climb gradient of 200ft/NM
What will be the visual illusion when turning from tailwind to headwind?
Illusion of decrease in speed and skid
On the contrary, when turning from headwind to tailwind, you will have an illusion of increase in speed and slip.
When choosing an alternate, if there is no IFR approach available, what are the weather minima?
Ceiling at least 500ft above the minimum IFR altitude, that will permit a VFR approach and landing.
What are the weather minima for an alternate where only a GFA is available?
- 1,000ft above lowest HAT/HAA
- No CB
- Visibility 3 SM
In a TAF, how do you use BECMG/TEMPO/PROB when choosing an alternate?
Taking the worse conditions of BECMG or TEMPO for the approach minima.
The PROB has to be above the landing minima requirements.
What are the conditions to conduct a contact approach?
Clear of clouds
1 NM flight visibility (NM !!!)
Reasonable expectancy of keeping these conditions to the destination airport
Only on pilot request
Pilot is responsible for noise abatment procedures and restrictions induced by Class F airspaces
Instrument, GNSS or GNSS overlay approach is available
What are the weather minima to conduct a visual approach?
Reported ceiling 500ft above minimum IFR altitude
3 SM visibility
In which cases can you pursue an approach even if RVR is below minima?
- In case of flight training, with the intent to conduct a missed approach
- In CATIII approaches
- RVR is received after the FAF
- RVR is fluctuating above and below minima, and ground visibility is above 1/4 SM.
What is the accuracy of the ADF?
En route : +/- 10°
On approach : +/- 5°
What is the suitable delay before the flight to file an IFR flight plan?
30 minutes, or 60 minutes for a flight to a foreign country
What determines the weather associated with a front?
Stability and moisture of the warm air mass
Speed of the cold air mass
Types of ice related to rate of catch and droplets size?
Rime ice = small droplets, low rate of catch (mainly stratiform clouds)
Clear ice = large droplets, high rate of catch (mainly cumuliform clouds)
Thin airfoil will also catch more ice than thick ones. Horizontal stabilizers will catch ice at a higher rate than wings. Speed of the aircraft is also a factor.
In any case, droplets are formed close to the freezing point, in the lower levels of the cloud (however, you can find supercooled droplets as cold as -40°C)
Small droplets freeze/solidify at lower T° than large ones.
What is the tolerance for an assigned speed during radar vectoring?
+/- 10 KIAS
How long is an instrument rating valid? What are the recency requirements?
24 months
RR :
- the original flight test within the last 12 months
- 6h of instrument flying, with 6 approaches to the minima, within last 6 months
- Same as above as a flight instructor
What is involved when a TAF includes the code VRB?
Wind is variable AND less than 3 kts
What is NOT mandatory when conducting a GNSS overlay approach?
It is not mandatory to monitor the ground-based navaids (VOR, etc.) (although it’s good airmanship)
Ground-based navaids and aircraft equipment are not to be installed and/or functioning when conducting an overlay approach (unless AFM requires it)
GNSS overlay approaches don’t exist over LOC-based approaches.
What is always provided by ATC in IFR? (included in the IFR clearance)
Traffic separation.
Obstacle clearance is the responsibility of the PIC (except during radar vectors, or when following a SID)
Outside minimum IFR altitude zones (airways/air routes) in mountainous areas, what is the minimum height above the highest obstacle you should respect?
1,500ft within 5 NM in zones 2, 3 and 4
2,000ft within 5 NM in zones 1 and 5
Tell me more about de-icing/anti-icing fluids types
Type I : 80% glycol, low viscosity, most for de-icing
Type II : 50% min glycol, higher viscosity, to be used on aircrafts with Vr > 100 KIAS
Type III : freezing point depressant, with a viscosity between Type I and Type II
Type IV : evolution of Type II, with a longer holdover time, dyed in green
What is the main error that can affect VOR?
At high altitude, the station coverage area may overlap, which causes Omni reading to be erroneous
What is the common frequency of a VOT?
There is none, each station has its frequency and there is no common one.
What does NOT ASSESSED mean on a departure procedure?
It means that the IFR departure hasn’t been assessed for obstacle clearance.
PIC is therefore responsible for determining climb gradients and routings for obstacle clearance and terrain avoidance.
ATC terms (« on departure », « right turn », « climb on course » etc.) are not to be considered specific departure instructions
What are the max airspeed for an hold?
At or below 6,000ft ASL : 200 KIAS
6,001ft to 14,000ft ASL : 230 KIAS
14,001ft ASL and above : 265 KIAS
Military aerodromes : 310 KIAS
Helicopters : 90 KIAS
What is the obstacle clearance provided by a circling approach procedure?
300ft above all obstacles in the visual manoeuvring area
Within how many minutes from planned engine start time an early request for an IFR clearance can be made by the pilot?
5 minutes