ac 91-006 srvsop - ICAO

SRVSOP AC 91-006
Paragraph Functional requirements Explanation
b) The following functions of the
basic RNP 1 system are
required as a minimum:
c) The means to display the
following items, either on the
primary field of view of the
pilots, or on a readily accessible
display page [e.g., on a multifunction
control display unit
1) The capability to continuously display to
the pilot flying (PF), on the primary flight
navigation instruments (primary navigation
displays), the RNP calculated desired path
and the position of the aircraft relative to
that path. For operations where the
minimum flight crew consists of two pilots,
the means for the pilot not flying (PNF) the
aircraft or monitoring pilot (MP) to verify the
desired path and the aircraft position
relative to that path must also be provided;
2) A navigation database containing current
navigation data officially issued for civil
aviation, which can be updated in
accordance with the aeronautical
information regulation and control (AIRAC)
cycle and from which ATS routes can be
retrieved and loaded into the RNP system.
The resolution of the stored data must be
sufficient to achieve an insignificant path
definition error (PDE). The database must
be protected against any modification of
the stored data by the flight crew;
3) The means to display to the flight crew the
period of validity of the navigation
database;
4) The means to retrieve and display the data
stored in the navigation database relating
to individual waypoints and NAVAIDs, to
enable the flight crew to verify the route to
be flown; and
5) The capability to load on the Basic-RNP 1
system, from the navigation database, the
complete RNP segment of the SIDs or
STARs to be flown.
Note.- Due to the variability of RNP systems, this
document defines the RNP segment from the first
occurrence of a named WPT, track or course up to the
last occurrence of a named WPT, track or course. Legs or
segments prior to the first named WPT or after the last
named WPT must not be loaded from the navigation
database. Heading legs prior to the first named WPT or
after the last named WPT do not have to be loaded from
the navigation database. The complete SID will be
considered in the Basic-RNP 1 procedure.
1) The active navigation sensor type;
2) The identification of the active (to)
waypoint;
3) The ground speed or time to the active (to)
waypoint; and
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