IF Navigation Flashcards
When are altimeter checks required?
Every 1000ft
200ft before level off
Commencing descent/climb
How many satellites are required en route and approach to maintain within PBN limits?
6 or more
Explain what colour is associated with which NAV source for the CDI bar?
VOR/ILS = Blue colour
ANAV (GNSS data) = Green colour
During IF cruise, what AFCS modes are best?
3 axis mode, ALT and NAV/HDG modes
You were flying along, selected NAV mode and the aircraft turned in a direction that you didn’t expect, what are your actions?
Reselect HDG mode, why did the aircraft do that?
Explain what levels of OEI accountability there are enroute? (3)
Unaccountable: At LSALT level flight is not possible OEI
Accountable at LSALT: At LSALT level flight is possible OEI
Accountable at cruise: At cruise, level flight is possible OEI
If the OEI accountability point is a while into the flight, what work around can be used?
- Fly high above the LSALT, with 100ft/min RoD, then 10 mins per 1000ft, effectively a glide range to descend to enroute low ground or nearby aerodrome MSA
When planning IFR, should flight through controlled airspace be avoided?
No, flight through controlled airspace is much easier
When planning to use RNP for a NAV, what kinds of systems can be used as backup in case GPS fails?
VOR/TACAN
Airports with radars
What RoC is required for the departure and missed approach?
Departure: 3.3%, 250ft/min @75KIAS
MA: 2.5%, 190ft/min @75KIAS
What is an LSALT accountability point and how is it calculated?
- Is the point in the nav where the aircraft is able to maintain LSALT OEI.
- Calculate a weight where 0ft/min is possible at LSALT, determine how long it would take to burn enough fuel and determine a distance for that to happen
Outside of the departure brief/actions on, what is required in circumstances when OEI RoC cannot meet the climb gradient:
Assuming 1000ft/min RoC AEO, every 1NM upwind you will have approx 750ft above the departure gradient.
Using the drift down RoC, you must be able to at the edge of the circling area be able to get back in a glide like profile
What can be set for bingo/joker?
Bingo = Alternate divert fuel OR OEI mass lvl flt @Cruise
Joker = Alternate divert fuel + approach OR OEI mass lvl flt @LSALT
What is the standard approach fuel and how can it be modified?
Standard = 10 mins or 60kgs
If a very efficient approach, use 5 mins, if inefficient, use 15 mins
How many satellites are required for accurate tracking?
6 satellites
Regarding alternates, most aerodromes require an alternate due to a lack of seperate approaches, what is the exception to this?
The aerodrome has an ILS with marker beacons (GPS not req) and a time based VOR
ATC has requested you track direct toward an WP you don’t have saved, what is you best option?
Request vectors
Under what circumstances can a pilot manually enter WPs and what restrictions are associated?
- Must be an emergency (RNAV only aerodrome, low fuel, no alternates)
- Must be cross checked
What format coordinates does the aircraft accept and how can they be converted?
- Aircraft only uses DMD (degrees, minutes, decimal minutes)
- To convert DMS to DMD divide seconds by 60
What distances/times are associated with traffic that presents a significant risk?
Within 10 mins, 10NM or 1000ft
You are approaching the hold when another aircraft is entering the missed approach to reenter the hold,how high should you fly?
Fly +1000ft from the missed approach height
Explain the biggest difference with jeppesen plates:
They have a briefing panel at the top
Don’t have the shaded box to reduce MDA/DH by 100ft
