North
Atlantic Guidance Material 3-5 7
th
Edition ii) when informed that an aircraft has lost the capability to maintain
its CFL appropriate to MNPS requirements iii) when the pilot requests traffic information to assist in alleviating potential visual perception problems associated with nearby aircraft iv) to safeguard separation between aircraft when advised by the pilot that the AKD ability has degraded below MNPS/RVSM Airspace requirements and v) when the radar displayed altitude (where applicable) differs from the CFL by 90 m (300 ft) or more.
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