NAT HLA Airspace Flashcards
What is required to enter the NAT HLA airspace
At least two fully serviceable long range navigation systems
Nat Contingencies
5NM offset left or right (30 degree turn)
500ft vertical offset
Descend below FL290 if possible
300ft climb/descent for weather deviation
PBN - RNAV 10 =
RNP 10 due to cost of changing nav specification
Changes in ETAs along North Atlantic must be made to ATC if changes are more than
3 minutes
NAT operating procedures need training of flight crew prior to operating within the NAT HLA with primary objective of training to
Highlight the risks of complacency and lack of adherence of SOPs due to over reliance on the provision and reliability of modern aeroplane systems
Oceanic clearance to be received when
At least 40 minutes prior to oceanic entry point ETA
Iceland 20 minutes
Airports within 40 minutes of boundary clearance before take off
Minimum lateral separation in NAT region in below or above MNPS
60nm between aircraft meeting minimum navigation performance specifications
Random routes waypoints spacing
10 degrees of longitude
Random routes are crossed at
Whole or half degrees of latitude
Recommended max time between random routes waypoints
60 minutes
Single LRNS routes
Blue spruce routes
Tango routes
Random routes should be what type of route
Great circle courses joining waypoints
Pre flight checks for NAT HLA flights by commander include
Master clock sync
Dual LRNS check
IRS/INS aligned
LRNS software and FMS up to date
Each pilot independently verifies lat/long of waypoint entries
Upload winds
Confirm present position
Groundspeed check (0)
Equipment required for NATs
2 x altimeters
1 altitude holding/altitude alerting
Transponder
Long range communication systems x2
HF radio
SATCOM for CPLDC
Altimeter within +-200ft accuracy
RCP 240
CPDLC communication method within 4 minutes of receiving message to action from the pilot
RSP 180
ASD-C main means of surveillance
HF frequencies used day and night
Night = lower 7MHZ
Day = Higher 8MHZ
123.45MHz
Global air to air frequency used when out of range of VHF stations for exchange of ops info
Requirements for blue spruce routes
Only 1 LRNS required
State approval for NAT HLA airspace required
Over Greenland
Used by ac not capable of performance based communication system track routes (vip routes)
NAT HLA vertical extent
FL285 to FL420
Random routes - East to west
10 degrees longitude crossed at whole or half degree of latitude
Random routes - North south directions
Separated by parallels of 5 degrees latitude
Crossed at whole degrees of longitude
Random routes on ATS flight plan are to use
DCT to each lat long
OTS Stands for
Organised track system
SLOP
Strategic lateral offset procedure’s
Any track using 0.1nm offset to the right of the designated track up to 2nm
OCA stands for
Oceanic control area
MASPS
Minimum aircraft system performance specification
When must you inform ATC if your ETA to entry point is to change
2 minutes
Frequencies used for communications in NAT HLA at night are generally
Less than 7MHZ at night
Frequencies used for communication in NAT HLA in the day
Greater than 8MHZ
Frequency used for pilot to pilot exchanges of operationally significant information
123.45MHz
OTS vs PBCS
OTS separated by 1 degree of latitude
PBCS separated by 0.5 degree of latitude
How many nm must a pilot diverge before the pilot changes his altitude to inform ATC?
5nm
SAND
South ascend
North descend
NATs transponder operation
Keep assigned transponder code for 30 minutes then switch to 2000
Minimum longitudinal separation for turbojets in NAT airspace flying with and without Mach number technique
15 minutes without Mach number technique
10 minutes with Mach number technique
Minimum longitudinal separation for non turbojet aircraft
30 minutes
20 minutes in West Atlantic route system
How many HF frequencies have been allocated and frequency band for North Atlantic Region
24 covers 2.8 to 18Mhz
When shall crew report ATC deviations from assigned FL in NAT HLA
300ft or more
MNPS Airspace latitudes
27n to the North Pole
Failure of INS how can pilot navigate safely in polar regions
Plot aircraft position and time on a polar stenographic chart
SLOP vs NAT contingency
SLOP right only 1 or 2 nm offset
NAT contingency right or left 5nm offset
