6 waypoint or leg sequencing capability equivalent to

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6. Waypoint or leg sequencing capability equivalent to that required by paragraph (a)(3)(xi) of this TSO for the appropriate equipment class (C1/C3 or C2/C4). 7. Position display capability equivalent to that required by RTCA/DO-208 paragraph 2.2.1.8 for the appropriate equipment class (C1/C3 or C2/C4). 8. Failure/status indication capability equivalent to that required by paragraphs (a)(3)(xiii) 1., 2., and 3. of this TSO for the appropriate equipment class (C1/C3 or C2/C4). 9. Flight plan capability equivalent to that required by paragraph (a)(3)(xxii) of this TSO for the appropriate equipment class (C1/C3 or C2/C4). 10. Approach Mode Sequencing capability equivalent to that required by paragraph (a)(3)(xii) of this TSO for the appropriate equipment class (C1/C3), with the exception of paragraphs (a)(3)(xii)1c, (a) (3)(xii)1d, (a)(3)(xii)1e.ii, and (a)(3)(xii)2b, and (a)(3)(xii)3b. (ii) Operation of Controls . Add the following requirement to paragraph 2.1.4. of RTCA/DO-208: Controls shall be designed to maximize operational suitability and minimize pilot workload. Reliance on pilot memory for operational procedures shall be minimized. (iii) Accessibility of Controls . Add the following requirement to paragraph 2.1.5 of RTCA/DO-208: Controls that are normally adjusted in flight shall be readily accessible and properly labeled as to their function. (iv) Sensor Interfaces . In lieu of paragraph 2.1.6 of RTCA/DO- 208, substitute the following requirement: The interfaces with other aircraft equipment must be designed such that normal or abnormal RNAV equipment operation shall not adversely affect the operation of other equipment nor shall normal or abnormal operation of other equipment adversely affect the RNAV equipment operation. (v) Update Rate . In lieu of paragraph 2.1.11 of RTCA/DO-208, substitute the following requirement: Data output shall be updated at an interval of 1.0 second or less. (vi) Integrity Alarm for GPS Receivers . Add the following requirements to paragraph 2.2.1.13 of RTCA/DO-208: 1Page 35
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TSO-C129a 1. The requirements of this paragraph do not apply to equipment certified to class C3 and C4. 2. Delete the second sentence of the opening paragraph 2.2.1.13.2 and replace with: "A separate and distinctive indication shall be raised in each of the following two circumstances." 3. Add the following requirement to paragraph 2.2.1.13.2 of RTCA/DO-208: In order to minimize nuisance integrity alarms when system navigation accuracy is otherwise not in doubt, properly substantiated compensating features (such as clock coasting, pressure altitude, inertial data, other sensors etc.) may be incorporated into the system. The alarm under these conditions may be delayed for a period of time consistent with the worst cases of undetected clock drift or other failures that would cause the position error to exceed the accuracy required for that phase of flight. The applicant must develop appropriate test procedures to demonstrate the proposed compensating features provide the required level of navigation accuracy and integrity.
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