Document ID: chunk:federal_register_of_legislation:F2022C00813:front:0:p22
Version: federal_register_of_legislation:F2022C00813
Segment Type: other
Provision Reference: 
Character Range: 62097–64984

60 m spacing, except that existing 90 m spacing is acceptable subject to assessment for Non-Precision Approach Runways intended to be used in visibility conditions of 1.5 km or more. The suitability of existing 90 m spaced lighting for night approaches must be assessed during the instrument approach validation process.

8.1.4                   Visual Segment Limitations

8.1.4.1              Runway Strip Width less than 300 Metres. Where a straight-in procedure is approved to a runway with a runway strip width of less then 300 m, the minimum obstacle clearance height (OCH) for straight-in procedures required must be no lower than the final segment minimum obstacle clearance plus

  metres
Note: The minimum OCH for straight-in procedures referred to in paragraph 8.1.4.1 is as follows:
 (a) Precision:
  As determined by OAS or CRM
 (b) Non-precision (without FAF - 295 ft MOC):
  Runway Strip Width (m) Minimum OCH (ft)
   230 311
   180 323
   150 330
   90 344
 (c) Non-precision (with FAF - 246 ft MOC):
  Runway Strip Width (m)  Minimum OCH (ft)
   230 262
   180 274
   150 281
   90 295

8.1.4.2              Parallel Runways—Sidestep Procedures. Sidestep procedures shall have a visual segment ceiling not less than that derived from the following formula:
        318.4 + F

Where VS = visual segment ceiling (feet)

 X = ceiling for final segment C/L intercept of 30°

  Values are:

   CAT A: 300

   CAT B: 330

   CAT C: 435

   CAT D: 540

 D = distance between parallel runways in nautical miles

 F = factor; for CAT A: 48; CAT B: 82; CAT C: 118; CAT D: 153.

 (above values are in feet)

8.1.5                   OCA and Descent Limits

8.1.5.1              In addition to the requirements of PANS‑OPS Vol II or ICAO Doc 9905 for RNP AR APCH, the following factors are to be taken into account in determining OCA:

(a)         Accuracy of Maps and Charts. The vertical and horizontal accuracy of the maps and charts used during instrument approach procedure design must be accounted for. In particular:

(i)            if the vertical accuracy of the map or chart cannot be determined a value of ± 10 m must be used;

(ii)          if terrain height is being determined from contour information, the height of the highest terrain must be assumed to be the height of the highest contour plus the contour interval of the map;

(iii)        spot height information does not attract any accuracy superior to that of contour information—therefore, despite the presence of spot height information, terrain height must be calculated from contour data in accordance with paragraphs 8.1.5.1(a)(i) and 8.1.5.1(a)(ii) above.

(iv)        survey control point information and the elevation of the top of some structures are subject to specific survey—therefore, these heights may be used without adding the map/chart vertical accuracy described in this sub-paragraph.

(b)