6.4 Recommendation: The equipment should not use rotary selection switches to select more than 10 discrete positions (661).
6.5 Recommendation: The equipment should not use thumbwheels for high or medium priority controls (662).
6.6 Recommendation: Non-tactile switches should activate on the first activation. This is equivalent to the down stroke (663).
NOTE: Non-tactile switches that have no displacement feedback: Examples include infra-red touch-panels, magnetic pick-up, capacitive pick up etc.
6.7 Recommendation: Equipment should not use lever switches to select more than 3 discrete positions (664).
6.8 Menus
6.8.1 All menus shall be appropriately positioned (665).
6.8.2 Recommendation: Menus should not impede the primary task (666).
6.8.3 Recommendation: Equipment should locate each high priority function not lower than the second page of any menu (667).
6.8.4 Recommendation: Equipment should locate each medium priority function not lower than the third page of any menu (668).
6.8.5 Recommendation: Each page should have an available selection to return up one level, return to top level and exit (669).
6.8.6 Recommendation: All functions should be by positive selection (670).
SUR 09 Video Map Generation Equipment Requirements
Part 1 Preliminary Material
1 Introduction
1.1 All ATS surveillance information display systems have a method of providing the controller with reference information. This allows a controller to determine the relationship between aircraft position and ground or airspace positions.
1.2 Although such systems can take various configurations, the procedures surrounding the systems will all take the same form.
2 Scope
2.1 This document applies to all surveillance information display equipment providing data for Air Traffic Services (ATS) and requiring approval under the Air Navigation Order (ANO).
2.2 This document covers all equipment used to produce or display information making up the fixed radar video map. This includes overhead projection, etched plates, independent video map generators or on-system video maps.
2.3 This document also covers the following areas: a) Procedures for the update control of video map data. b) Responsibilities for the update of video map data. c) Recommendations for the co-ordinate system used for transfer of data.
Part 2 Requirements
3 Safety Objective
The video map generation equipment shall provide complete and accurate reference data for ATS (1715).
4 Procedure for Production and Update of Video Maps
4.1 Video map generation shall be subject to formal configuration management (671).
4.2 Each map or generation of map shall be given a unique identifying label (672). The map as displayed on the equipment shall display this label (673). In addition, documentation shall use this label to show the origin and contents of the information used on the map (674).
4.2.1 Recommendation: A suitably qualified engineer should carry out this function (675).
4.3 The individual elements to be included on the map shall be identified and documented in the Operational Requirement (676).
4.3.1 Recommendation: The definition of such elements should be in terms of ATS requirements. These elements should include the following: a) Visual reporting points (677). b) Adjacent airfields (678). c) Adjacent areas of flying activity. For example, hang gliding sites, parachuting sites, etc (679). d) Danger areas, prohibited areas etc (680). e) Limits of controlled airspace (681). f) Runway extended centrelines (682).
g) Map north marker (683).
NOTE: For certain ATS units additional points may be required.
4.3.2 Recommendation: A member of the ATC Department should carry out Step 4.3 and 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：CAP 670 Air Traffic Services Safety Requirements 2(94)
