CLAS05

An aeroplane is planned to be flown commercially in the North Atlantic High Level Airspace (NAT HLA). The use of LRNSs for operation in the NAT HLA is approved by:

• EASA
• ICAO
• The state of registry
• I ATA

An aircraft wishes to fly the PBCS routes in the NAT HLA. What are the requirements?

• 3 LRNS.
• ADS-C and CPDLC.
• Increased RVSM capability.
• No special requirements.

What are the requirements for Performance Based Communication and Surveillance (PBCS) when operating on a PBCS route in the NAT HLA?

• Continuous data-link communication must be available for all aircraft.
• An Enhanced Ground Proximity Warning System (EGPWS) must be installed.
• Three Long-Range Navigation Systems (LRNSs) are required.
• Reduced Vertical Separation Minimum (RVSM) is mandatory.

A flight is planned via the T 16 route in the NAT HLA. The aircraft is equipped with two LRNSs (Long Range Navigation Systems) but one LRNS fails prior to entering NAT HLA. Which of the following is correct.

• If the crew can obtain special approval in time from Shanwick, they may be able to route via T 16 as planned.
• The flight can operate as planned as routes T 9, T 16 and T 213 only require one LRNS.
• The aircraft cannot enter NAT HLA to fly route T16, but could re-route using domestic airspace.
• The crew cannot continue the flight as two functioning LRNSs are required in all of NAT HLA.

Who provides service within the Northern Oceanic Transition Area (NOTA) and Shannon Oceanic Transition Area (SOTA)?

• NOTA: Shanwick ACA; SOTA: Shannon Control
• NOTA: Shanwick ACA; SOTA: Shanwick ACA
• NOTA: Shanwick ACA; NOTA: Shannon Control
• NOTA: Shannon Control; SOTA: Shannon Control

Taking into consideration Northern Oceanic Transition Area (NOTA) and Shannon Oceanic Transition Area (SOTA) - which one is in NAT HLA and which one has the same instrument requirements as NAT HLA?

• Neither NOTA and SOTA is in NAT HLA, hence no instruments requirement like in NAT.
• Either NOTA and SOTA is in NAT HLA, hence instruments requirement like in NAT.
• SOTA is in NAT HLA, however requirements only apply if continuing into NAT HLA.
• NOTA is NAT HLA, hence instruments requirement like in NAT.

Taking into consideration Northern Oceanic Transition Area (NOTA) and Shannon Oceanic Transition Area (SOTA) - which one is in NAT HLA and which one has the same instrument requirements as NAT HLA?

• Neither NOTA nor SOTA are part of NAT HLA, hence no instruments requirement like in NAT.
• Both NOTA and SOTA are part of NAT HLA, hence instruments requirement like in NAT.
• NOTA is a part of NAT HLA and no required equipment like NAT HLA.
• SOTA is not a part of NAT HLA and no required equipment like NAT HLA, except if routing towards NAT HLA.

A COMMERCIAL air transport flight is planned via TI 6 airway to benefit from stronger tailwinds. One of the FMS is inoperative. What implications, if any, are there for the continuation of the flight?

• Airway TI 6 may be used as planned since the aeroplane maintains Its navigation capability with the remaining FMS.
• The aircraft should return to the departure aerodrome as flight with only one FMS means that NO redundancy exists and is forbidden.
• The pilots must request a reroute via T 290 or T 9 since the aeroplane has only one serviceable LRNS.
• The pilots must avoid NAT HLA since entry to NAT HLA is forbidden with only one serviceable LRNS.

Consider NAT HLA flight operations, when flying in the New York Oceanic East area. For the application of 50 NM lateral separation, which RNP designation is the minimum navigation specification?

• RNAV 1
• RNAV 5
• RNAV 2
• RNAV 10

Navigation tasks at high latitudes may be complicated due to:

• The convergence of the meridians.
• The divergence of the meridians.
• The INS rigidity in space.
• The conversion of grid navigation data into compass navigation data.