UVC Questions Flashcards
OCL/ORCA
Oceanic route clearance authorisation (for planners)
TOI validity?
Up to 6 months.
Can be reissued if needed for longer
When do aircraft request clearance?
At least 30 and no more than 90 minutes before the estimate for OCA boundary
Frequency - a/c registered west of 30 west
123.95
Frequency - a/c registered east of 30 west
127.65
EIAA (Ballygirreen) South
127.9
Used as far as practicable when East of 20 west to reduce HF loading
EIAA (Ballygirreen) north
124.175
Used as far as practicable when East of 20 west to reduce HF loading
Frequency - emergency/guard
121.5
Frequency - en route for pilot to pilot communications
123.45
4 VHF transmitter locations
Dundonald hill - Ayrshire
Mangersta - Isle of Harris
Grantham - Lincolnshire
Davidstow Moor - Cornwall
NARTEL
North Atlantic radio telephony
5 HF frequency families A-F (excluding E)
NAT A HF frequencies
Aircraft flying routes with coordinates between 43N - 47N
NAT B HF frequencies
Aircraft flying routes with coordinates between 47N - 64N
Aircraft registered west of 30 west
NAT C HF frequencies
Aircraft flying routes with coordinates between 47N - 64N
Aircraft registered east of 30 west
NAT D HF frequencies
Aircraft flying routes with coordinates north of 62N
NAT F HF frequencies
Assigned to aircraft flying routes entirely within the gander and shanwick area
Assigned on a tactical basis and coordinated between gander and shanwick radio
Message not delivered
Shanwick advised:
After not more than 10 minutes
After not more than 8 minutes if marked PRIORITY
Immediate delivery - shanwick radio must be advised by telephone and a hard copy must be sent
ORCA
Oceanic route clearance authorisation
Issues clearance to westbound flights entering shanwick along domestic boundary from ATSIX to PASAS
ARINC 623
Request clearance
Receive clearance
Acknowledge clearance
ARINC 620
Request clearance
Receive clearance
Cannot acknowledge clearance, must be read back via CDO
ADS
Automatic dependant surveillance
Allows FMC to make automatic position reports without pilot input
More accurate than HF
Services provided by en route controller
At and above FL55:
Air traffic control
Flight information service
Alerting service
Below FL55:
Flight information service
Alerting service
