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Glossary
Activation Altitude: The selectable altitude at which (if
A
oceanic operation is armed) the NMC will automatically
enter the active state and begin navigating in the
Oceanic/Remote flight phase.
Almanac: Data transmitted by a GPS satellite including
orbit information on all satellites, clock correction, and
atmospheric delays.
Altitude (GPS ALT): Altitude based upon a mathematical
model of the earth's surface curvature. A substantial
difference between this altitude value and altitude referenced
to sea level may exist.
Approach: A predefined sequence of waypoints used
during approach procedures.
Approach Active, Approach Active Mode: The phase of
flight used for GPS nonprecision approaches that is
concurrent with approach RAIM integrity and full scale
deflection at 0.3 nm. During approach active mode, approach
is enabled, the MAP is the current TO waypoint, and
waypoint sequencing is on HOLD.
Approach Enabled: A state that allows automatic transition
to approach active mode. When approach is first enabled, the
flight mode transitions from terminal to approach transition.
Approach can only be enabled when within 30 nm of the
destination airport.
Approach RAIM Integrity: 0.3 nm RAIM alarm limit.
Approach Transition, Approach Transition Mode: Phase
of flight concurrent with terminal RAIM integrity and full
scale deflection at or transitioning to 1.0 nm. During
approach transition mode, approach is enable.
Approach Waypoint: A waypoint that is part of a published
approach (all waypoints from IAF to the MAHP).
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