Ii accessibility of controls add the following

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(ii) 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. (iii) 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. (iv) Control/Display Readability . In lieu of paragraph 2.1.8 of RTCA/DO-208, substitute the following requirement: The equipment shall be designed so that all displays and controls shall be readable under all normal cockpit conditions and expected ambient light conditions (total Page 4    (a)(3)(vii)  
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TSO-C129a darkness to bright reflected sunlight). All displays and controls shall be arranged to facilitate equipment usage. NOTE: Limitations on equipment installations to ensure display readability should be included in the installation instructions. (v) Maneuver Anticipation . Add the following requirement to paragraph 2.1.10 of RTCA/DO-208: For systems approved for non precision approaches (class A1 equipment), maneuver anticipation (turning prior to the "to" waypoint) shall not be implemented at the missed approach fix or the missed approach holding fix. (vi) Update Rate . In lieu of paragraph 2.1.11 of RTCA/DO-208, substitute the following requirement: Navigation information used for display shall be updated at an interval of 1.0 second or less. (vii) Numeric Display Information . In lieu of paragraph 2.2.1.1.1 of RTCA/DO-208, substitute the following requirement: 1. Equipment certified to class A2 shall continuously provide either a display or electrical output with the following requirements: a. The display shall be as accurate as the resolution required for the displayed full scale range, referenced to a centered CDI display (see table in paragraph (a)(3)(viii)). b. The equipment shall provide a numeric display or electrical output of cross-track deviation to at least + 20 nm (left and right). A minimum resolution of 0.1 nm up to 9.9 nm and 1.0 nm beyond shall be provided. The display may be pilot selectable. 2. Equipment certified to class A1, shall, in addition to the requirements for class A2: a. Provide a numeric (digital) display or electrical output of cross-track deviation to a resolution of 0.01 nm for deviations less than 1.0 nm. b. Compute and display track angle error (TAE) to the nearest one degree. Track angle error is the difference between desired track and actual track (magnetic or true). In lieu of providing a numeric display of track angle error, non-numeric TAE may be displayed in conjunction with the non-numeric cross-track deviation, provided the display provides equivalent situational awareness.
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