5.141~5.150

5.141 起始点纬度 Starting Latitude

  5.141 Starting Latitude
  Definition/Description: The Grid MORA Table will contain records describing the MORA for each Latitude and Longitude block. Each record will contain thirty blocks and the “Starting Latitude” field defines the lower left corner for the first block of each record.
  Source/Content: The “Starting Latitude” will be determined when the record is assembled.
  Used On: Grid Mora record
  Length: 3 characters
  Character Type: Alpha/numeric
  Examples: N00, N42, S20, S90

  5.141 起始点纬度
  定义或描述：网格最低航路外高度(MORA)表包括描述每个经纬网格的MORA的记录。每个记录包括30块，起点纬度字段定义每个记录第1块的左下角。
  数据源或供选编码：在集成记录时确定起点纬度。
  应用范围：网格MORA记录
  字节数：3位
  字符类型：字母/数字
  举例：N00、N42、S20、S90

5.142 起始点经度 Starting Longitude

  5.142 Starting Longitude
  Definition/Description: The Grid MORA table will contain records describing the MORA for each Latitude and Longitude block. Each record will contain thirty blocks and the “Starting Longitude” field defines the lower left corner for the first block of each record.
  Source/Content: The “Starting Longitude” will be determined when the record is assembled.
  Used On: Grid Mora records
  Length: 4 characters
  Character Type: Alpha/numeric
  Examples: E000, W150, E090, W180

  5.142 起始点经度
  定义或描述：网格最低航路外高度(MORA)表包括描述每个经纬网格的MORA的记录。每个记录包括30块，起点经度字段定义每个记录第1块的左下角。
  数据源或供选编码：在集成记录时确定起点经度。
  应用范围：网格MORA记录
  字节数：4位
  字符类型：字母/数字
  举例：E000、W150、E090、W180

5.143 网络MORA Grid MORA

  5.143 Grid MORA
  Definition/Description: Grid MORA Minimum Off-route Altitude (MORA) provides terrain and obstruction clearance within the section outlined by latitude and longitude blocks provided in the Starting Latitude and Starting Longitude fields.
  Source/Content: Grid MORA values clear all terrain and obstructions by 1000 feet in areas where the highest elevations are 5000 feet MSL or lower. MORA values clear all terrain by 2000 feet in areas where the highest elevations are 5001 feet MSL or higher. The field will contain values expressed in hundreds of feet, for example, the value of 6000 feet is expressed as 060 and the value of 7100 feet is expressed as 071. For geographical sections that are not surveyed, the field will contain the alpha characters UNK for Unknown.
  COMMENTARY：MORA values are generally not provided in government source and are calculated by the data supplier using the formula indicated in the Source/Content paragraph. There are, however, some governments that do provide off route altitude data and a data supplier may elect to use the government source values in their data services.
  Used On: Grid MORA Records
  Length: 3 characters
  Character Type: Alpha/numeric
  Examples: 010, 071, 100, 123, UNK

  5.143 网络
  定义或描述：最低航路外高度(MORA)提供起止经纬度形成的方块范围内的地形和障碍物超障高度。
  数据源或供选编码：MORA值在标高5000英尺以下的区域内，超障高为1000英尺；5001以上区域内超障2000英尺。该字段填入的数据以百英尺为单位，例如6000英尺表示为060，7100表示为071。未测量的区域填写UNK。
  建议：MORA值通常不是官方提供，而由数据商按照上述公式计算。但是有的国家公布航路外高度数据，此时数据商采用国家官方数据即可。
  应用范围：网格MORA记录
  字节数：3位
  字符类型：字母/数字
  举例：071、100、123、UNK

  本表所示为在文件中出现的网格MORA的样例。从N00/E000开始，在N14/E29结束，网格以60分分隔。起始纬度和起始经度字段的值表示的以1度纬线/经线方框的左下方的值。表的上方的值仅为说明之用，并在下角表示表中MORA值对应的经度。本样例中省略E007至E028之间的数值。

5.144 圆心点 Center Fix

  5.144 Center Fix (CENTER FIX)
  Definition/Description: When used on Airport and Heliport MSA Records and specific terminal procedure records, the “Center Fix” field represents the MSA Center, that point (Navaid or Waypoint) on which the MSA is predicated. When used on Terminal Procedure Records incorporating an “RF” Path and Termination, the field represents the point (Terminal Waypoint) which defines the center of the arc flight path.
  Source/Content: When used as “MSA Center,” the field will contain the identification of the navigation facility, Enroute Waypoint, Terminal Waypoint, Runway or Airport Reference Point upon which the MSA coverage radius is predicated. Such content will be derived from official government sources. When use as “ARC Center,” the field will contain the identification of the Terminal Waypoint used to define the arc. ARC Center waypoints can only appear in the Airport Terminal Waypoint or Heliport Terminal Waypoint Section/Subsections.
  Used On: Airport and Heliport MSA Records, Airport and Heliport SID/STAR/Approach Records
  Length: 5 characters max.
  Character Type: Alpha/numeric
  Examples: HOM, YXRNB, MM18, ARC02

  5.144 圆心点
  定义或描述：在机场和特定的终端区程序记录中使用时，中心点字段代表MSA的中心，MSA要以此点(NAVAID或航路点)为基础。本项应用于包括“RF”航径终端形式代码的终端程序时，表示定义圆弧飞行航径的中心的那一点。
  数据源或供选编码：在使用MSA中心时，包括有关设施的识别，即：MSA以其为半径范围依据的导航台、航路/终端区航路点、跑道或机场参考点等的识别。这些内容来自官方，当用作ARC中心时，包括应用于定义弧的终端区航路点的识别。弧中心航路点只能出现在机场终端航路点或直升机场终端航路点字段/节中。
  应用范围：机场MSA记录，机场SID/STAR/APCH记录
  字节数：5位
  字符类型：字母/数字
  举例：HOM、YXRNB、MM18、ARC02

5.145 半径限制 Radius Limit

  5.145 Radius Limit
  Definition/Description: The altitude shown in the “Sector Altitude” field provides a 1000 foot obstacle clearance with a specified radius from the navigational facility/fix. The “Radius Limit,” field allows the radius to be specified.
  Source/Content: Radius limits will be derived from official government sources. Values will be shown in whole nautical miles.
  Used On: Airport and Heliport MSA Records
  Length: 2 characters
  Character Type: Numeric
  Examples: 25, 30

  5.145 半径限制
  定义或描述：在扇区高度字段中表示自导航台/定位点以一个规定半径范围提供1000英尺超障高度。表示该规定的半径。
  数据源或供选编码：数据来自官方，以整海里表示。
  应用范围：机场的MSA记录
  字节数：2位
  字符类型：数字
  举例：25、30

5.146 扇区方位 Sector Bearing

  5.146 Sector Bearing(SEC BRG)
  Definition/Description: When the MSA is provided as sectors of a circle, the field defines the beginning and end bearings of the sectors. The bearings are to the MSA Center Fix. When used on TAA records – The sector bearings in TAA records are the start and end bearings that define a TAA area and are to the TAA IAF Waypoint defined in that TAA identified as the straight-in or center sector record (Section 5.272). For both the MSA and the TAA record use, the bearings are entered clockwise. They enclose the sector defined in the record. The values are inclusive.
  Source/Content: The Sector Bearing information will be derived from official government sources. Each sector is made up of the start of sector bearing and the end of sector bearing. The values are provided in whole degrees. The first three characters identify the start sector bearing. The second three characters identify the end sector bearing. For a MSA that is a circle, no sectors both the start and the end bearing set to 180.
  Used On: Airport and Heliport MSA and TAA Primary Records
  Length: 6 characters
  Character Type: Numeric
  Examples:
  060140: a Sector that starts at 060 degrees and continues clockwise to end at 140 degrees
  140060：a Sector that starts at 140 degrees and continues clockwise to end at 060 degrees
  180180：a full circle MSA Sector

  5.146 扇区方位
  定义或描述：当MSA作为一个圆的几个扇区表示时，定义扇区的起止方位。方位为至MSA中心定位点的数值。当应用于TAA记录时，在TAA记录中的扇区方位即定义TAA的起止方位，并为至TAA IAF航路点的方位，在其中TAA作为直线进近区记录或中心扇区记录识别，见5.272。当应用于MSA或TAA 记录，为顺时针方位。包括的扇区在记录中定义并包括相关数值。
  数据源或供选编码：数据来自官方，每扇区需要3个字段定义。第1“扇区方位”表示被定义扇区的起始方位，以整度表示。第2字段“扇区高度”说明该扇区的高度，第3字段“扇区方位”，以整度定义终止方位，同时作为下一扇区的开始方位。如果MSA是一个扇区或一个圆时，第1扇区方位项中填写180。
  应用范围：机场的MSA主记录
  字节数：6位
  字符类型：数字
  举例：
  060140：扇区从060度起顺时针至140度止；
  140060：扇区从140度起顺时针至060度止；
  180180：一个完整圆圈的MSA扇区。

5.147 扇区高度 Sector Altitude

  5.147 Sector Altitude (SEC ALT)
  Definition/Description: When used on MSA records, the “Sector Altitude” provides a 1000 foot obstacle clearance within the specified sector. When used on TAA records, the “Sector Minimum Altitude” is the minimum altitude for that sector, providing obstacle clearance compatible with the instrument procedures with which the TAA is associated, generally 1000 feet or more as necessary in mountainous areas. Flight crews are expected to fly direct to the initial approach fix in the record at the appropriate sector altitude unless otherwise instructed by ATC.
  Source/Content: Sector Altitude values are derived from official government source and are provided in hundreds of feet.
  Used On: Airport and Heliport MSA Records and TAA Primary Records
  Length: 3 characters
  Character Type: Numeric
  Examples: 010 = 1000ft, 025 = 2500, 100= 10,000

   5.147 扇区高度
  定义或描述：在扇区高度记录中使用，扇区高度表示在规定扇区范围内提供1000英尺的超障高。在TAA记录中使用，“扇区最低高度”是该扇区的最低高度，向相关TAA的仪表程序提供合适的超障高，通常在山区提供1000英尺以上的超障高。飞行员可在记录的规定扇区高度上直飞起始进近定位点，除非ATC有其它指示，
  数据源或供选编码：高度数据来自官方，以百英尺为单位。
  应用范围：机场的MSA记录
  字节数：3位
  字符类型：数字
  举例：010、025、100

5.148 航路备降机场 Enroute Alternate Airport

  5.148 Enroute Alternate Airport (EAA)
  Definition/Description: The “Enroute Alternate Airport” field identifies the most suitable emergency airport along a Company Route.
  Source/Content: This field is determined by the user airline and will contain the Airport ICAO Ident.
  Used On: Company Route records
  Length: 4 characters
  Character Type: Alpha/numeric
  Examples: KDEN, EGKK, EDFF

  5.148 航路备降机场
  定义或描述：表示沿公司航路的最适用的紧急机场。
  数据源或供选编码；由用户公司填写，使用ICAO机场识别。
  应用范围：公司航路航线记录
  字节数：4位
  字符类型：字母/数字
  举例：KDEN EGKK EDFF

5.149 功能代码 Figure of Merit

  5.149 Figure of Merit
  Definition/Description: The “Figure of Merit” field is used to specify VHF Navaid facility usable ranges beyond that specified in the Class field. It is also used to specify when a VHF Navaid contained in the database is not available for operational use, i.e., is out of service and is used to flag a VHF Navaid that is not included in a civilian international NOTAM system.
  Source/Content: Actual Field Entry Values are not contained in official government source but rather are derived values based on usage, class, availability etc. These may be further adjusted by input from actual users. The content will be as defined in the table below.
  Used On: VHF Navaid Records
  Length: 1 character
  Character Type: Numeric

  5.149 功能代码
  定义或描述：用于在等级字段中说明内容之外，描述VHF台使用的距离。同时应用于说明在数据库中的VHF台何时不供使用，例如停工，并且应用于标记一个不包括在国际NOTAM通知范围的VHF台。
  数据源或供选编码：该项实际数据并不来自官方，而是根据使用情况和等级划分等来确定。这些数据可能由具体用户提供作进一步修改。填写内容根据下表。
  应用范围：VHF台记录
  字节数：1位
  字符类型：数字

5.150 频率保护距离 Frequency Protection Distance

  5.150 Frequency Protection Distance (FREQ PRD)
  Definition/Description: The “Frequency Protection Distance” field provides an indication of the distance to the next nearest NAVAID on the same frequency.
  Source/Content: The distance to the next NAVAID will be computer generated values. Values will be entered on NAVAID with DME or TACAN equipped facilities only and will indicate the distance, in nautical miles, to the next nearest DME or TACAN equipped facility. Maximum relevant value will be 600 nautical miles.
  Used On : VHF Navaid records
  Length: 3 characters
  Character Type: Alpha/numeric
  Examples: 030, 150, 600

  5.150 频率保护距离
  定义或描述：提供在同一频率上，下一最近导航台的距离。
  数据源或供选编码：下一最近导航台的距离值由计算机生成。这些值只填入有DME或TACAN的导航台，以NM表示至最近的下一个DME或TACAN的距离，最大值为600NM。
  应用范围：VHF台记录
  字节数：3位
  字符类型：字母/数字
  举例：030、150、600

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