Navigation Flashcards
What is QNH?
Height AMSL.
What is QFE?
Height above airfield. (To touchdown zone).
What is height?
Vertical distance from a given datum.
What is Altitude?
Height AMSL.
What is Elevation?
Height of something from AMSL. e.g. Mountains.
How is QNH measured?
Pressure at airfield adjusted to read ground elevation.
Who uses QFE?
British military.
Who uses QNH?
Flights in vicinity of civil aerodromes. For calculating TL. For Calculating minimum safe flight level.
What is the standard pressure change with height?
1 hpa per 30 ft (27.3 ft…)
What pressure setting do you use for Flight Levels?
Standard Altimeter Setting (SAS) 1013 hpa.
What is RPS?
Regional Pressure Setting.
How is RPS calculated?
Lowest forecast QNH within a desginated Altimeter Setting Region (ASR).
How often is the RPS issued?
Every hour.
Which ASR is CRN and BKH in?
Barnsley.
When do we use the SAS?
All flying above TA. Flying above 3000ft in the UK outside Controlled Airspace.
How is Safety Altitude Calculated?
5nm either side of track (30nm for EFT). Highest point -> rounded up (to the nearest hundred) -> plus 1000ft (if terrain = 3000ft+ plus 2000ft).
What is SAlt?
Provides aircrew with a safe altitude at which to fly when visual separation from the ground is not possible.
At what height is the Minimum FL?
At least 1000ft above Transition Altitude (TA).
How do you calculate Pressure Altitude of an Airfield?
Airfield Elevation + (30 x p). 30 = hPa to ft p = (1013 -Aerodrome QNH).
What is the Navigation Work Cycle?
Pre-turn checks. Post-turn checks. Fix point activity.
Which checks do we use for Navigation?
Pre-HAAT
Post-HAAT
FIREASH - for entry/descent into LL Nav Routes
What actions should you take when you are uncertain of your position?
Admit it. Carry out a gross error check. Locate large unique ground feature. Consider use of EFIS “Nearest function”. Climb to improve field of view. Consider Training fix. Monitor fuel.
Advisory Airway Structure
Aerodrome Protection zone (Permenant)
Aerodrome Protection zone (Parachute)
Aerodrome Protection zone (Seasonal)
Aerodrome with training movements
Airodrome with hard runway +3000ft
Altimeter Setting Region (ASR)
ATZ/MATZ Initial Contact Frequency
In this case 111.00
Control Boundary (eg. TMA, CTA, TIA, SRA)
Aerodrome Protection zone (Scheduled)
Aerodrome Protection zone (Seasonal)
Disused Aerodrome
Generalised Airway Structure
Glider Site
Hang Gliding Site
Helicopter Corridors
Helicopter Routes
HLS
Light Vessel
Marine Light
Microlight Site Standard avoidance
Microlight Site
Minor Aerodrome Airfield with 6+ movements per day
Minor Aerodrome
Mountain rescue training lift point / Civilian police / Helicopter support unit / Air ambulance
Overland Helicopter Routes
Radio Mandatory Zone
RNAV Airway Route
Sea Plane Base
Visual ref point
Zone boundary
TACAN
VOR DME
VOR NDB
Maximum Elevation Figure
Prohibited/Danger/Restricted Areas (Permanent)
Prohibited/Danger/Restricted Areas (Scheduled)
Prohibited/Danger/Restricted Areas (NOTAM’d)
Parachute DZ (Permanent)
Parachute DZ (Scheduled)
Parachute DZ (NOTAM’d)
Small Arms Range
Industrial/Environmental Avoid
Tactical Trg Avoidance
Avoidance Area
Protection Area
Medical Establishment
Minor town to be avoided within TTA
GSL
GSU
GML
GMU
CSL
CSU
CML
CMU
RED MSL
BLUE AGL
SSL
SSU
SML
SMU
lighthouse
Overland Wind Turbine
Suspended Obstruction
Powerlines 80-200 ft AGL
Powerline +200ft agl
Offshore installation(s)
Off shore installation(s) with helipad
Off-shore wind turbine
Tactical Training Area
Weather Corridor
Corridor Entry/Exit Point
Dedicated User Area
Unidirectional flow arrow
multidirectional flow
Unidirectional flow between 2 restrictions
Start of entry exit points
Low Flying Area
Transit Area Corridor
Flow Corridor
Flow Dividing Line
Chevoit Line
JTIDS Joint Tactical Information Distribution System
HIRTA with obstruction and lateral avoidance
HIRTA with No obstruction and no specified lateral avoidance with band and vertical height avoid
HIRTA with No obstruction and specified lateral avoidance
Susceptibility
L>M>H
Night area
Motorway with service area and with junction number
Motorway with junction number
Motorway with service area and juntion
Multi Track Railway
Single Track Railway
