2 equipment certified to class a1 shall at least

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2. Equipment certified to class A1 shall at least provide the capability to manually enter and display (prior to its utilization in the flight plan) the coordinates of a waypoint in terms of latitude and longitude with a resolution of 0.01 minute or better. If the equipment provides the ability to enter a waypoint as a range and bearing from another waypoint, the waypoint input resolution shall be 0.1 nm and 0.1 degree or better. (x) Waypoint Storage . In lieu of paragraph 2.2.1.6 of RTCA/DO- 208, substitute the following requirements: 1. The equipment shall provide an appropriately updatable navigation data base containing at least the following location information in terms of latitude and longitude with a resolution of 0.01 minute or better for the area(s) in which IFR operations are to be approved: all airports, VORs (and VORTACs), NDBs, and all named waypoints and intersections shown on en route and terminal area charts, Standard Instrument Departures (SIDs) and Standard Terminal Arrival Routes (STARs). NOTE: Manual entry/update of navigation data base data shall not be possible. (This requirement does not preclude the storage of "user defined data" within the equipment.) 1Page 7
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TSO-C129a 2. Equipment certified to class A1, in addition to the requirements of paragraph (a)(3)(x)1, shall provide the following: a. The equipment navigation data base shall also include all waypoints and intersections included in published non-precision instrument approach (except localizer, LDA, and SDF) procedures. b. The equipment shall store all waypoints, intersections, and/or navigation aids and present them in the correct order for a selected approach as depicted on published non-precision instrument approach procedure charts. The sequence of waypoints shall consist of at least the following: selected initial approach fix (IAF), intermediate approach fix(es) (when applicable), final approach fix, missed approach point, and missed approach holding point. For procedures with multiple IAFs, the system shall present all IAFs and provide the capability for pilot selection of the desired IAF. Selection of the desired IAF shall automatically insert the remaining waypoints in the approach procedure in the proper sequence. c. Waypoints utilized as a final approach fix or missed approach point in a non-precision approach procedure shall be uniquely identified as such to provide proper approach mode operation. d. Modification of data associated with published instrument approach procedures by the user shall not be possible. e. Waypoint data utilized in non-precision approach procedures shall be in terms of latitude and longitude and cannot be designated in terms of bearing (radial) and distance to/from a reference location. f. When in the approach mode, except for holding patterns and procedure turns, the equipment must establish the desired flight path in terms of the path between defined endpoints up to the missed approach point.
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