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14.2  The pilot shall provide confirmation of the performance of the navigational aids used for the IAP. The Air Traffic Service Provider shall formally record this confirmation (2150).
Table 1 Localiser Limits Table 1 Localiser Limits (Continued) Table 1 Localiser Limits (Continued) Table 1 Localiser Limits (Continued) Table 2 Glidepath Limits Table 2 Glidepath Limits (Continued) Table 2 Glidepath Limits (Continued) Table 3 Marker Beacon Limits
Parameter  Commissioning  Annual / Routine  Transmitter to bechecked 
AlignmentOf nominal total angular width  Cat I ± 1.5% (1895)Cat II ± 1.0% (1896)Cat III ± 0.5% (1897)  Cat I ± 5.0% (1194)Cat II ± 2.1.% (2151)Cat III ± 1.4% (1196)  Commissioning 1 & 2Annual 1 & 2Routine 1 & 2 
Displacement SensitivityOf the nominal displacement sensitivity  Cat I ± 5% (1901)Cat II ± 3% (2152)Cat III ± 3% (1903)  Cat I ± 17% (1904)Cat II ± 10% (2153)Cat III ± 10% (1906)  Commissioning 1 & 2Annual 1 & 2Routine 1 & 2 
Symmetry (either side of courseline)of the measureddisplacement sensitivity  45% to 55% (1200). In cases of disagreement with the ground figures, the ground measurements atthreshold shall be used for assessment (1201)  Commissioning 1 & 2Annual 1 & 2Routine 1 & 2 
Modulation Sum SDMsum of the modulation depths of the navigational tones  39% and 41% (1220).Measured when approaching the facility,where the ddm is approximately zero (1218)  36% and 44% (1219)Measured when approaching the facility, where the ddm is approximately zero (1218)  Commissioning 1 & 2Annual 1 & 2Routine 1 & 2 
Off Course Clearance  Substantially linear increase from the front courseline to an angle where the deflection current is 175 μA (0.18 ddm) (2154). From this angle to 10° on the same side, the deflection current must not fall below 175 μA (0.18 ddm) (2155). From ±10° to ±35° the deflection current must not fall below 150μA (0.155 ddm) (2156).It is desirable that the deflection current in the region between 10° and 35°should not be below 175 μA (0.18 ddm). Wherever possible, systems should be adjusted to achieve this. (2157)  Commissioning 1 & 2Annual 1 & 2Routine 1 & 2 

Parameter  Commissioning  Annual / Routine  Transmitter to bechecked 
Coverage  Usable signals at edge of DOC, ±10° from thecentreline (2158)Usable signals at 17 NM,±10° to ±35° from the localiser centreline (1213)  Annual only.Usable signals at edge of DOC on the localisercentreline (2159)  Commissioning 1 or 2Annual 1 or 2Routine None 
Usable signals between ±35° from the localiser centreline at or beyond 6NM from the localiser (2160).  Commissioning 1 & 2Annual 1 & 2Routine 1 & 2 
Usable signals shall be receivable to the distances specified, at and above a height of 2000 feet abovethe elevation of the threshold or 1000 feet above the elevation of highest point within the intermediateand final approach areas, whichever is the higher (1214).A usable signal is defined as a signal producing localiser flag current of not less than275 μA and a ddm conforming to the off course clearance requirements. **Ref to Eurocae ED46B. 

Parameter  Commissioning  Annual / Routine  Transmitter to bechecked 
Course Structure  Cat I 30 μA (0.031 ddm) Edge of DOC to point A, then decreasing at a linear rate to 15 μA (0.015 ddm)at point B. 15 μA (0.015 ddm) from point B to point C (2161)Cat II / III30 μA (0.031 ddm) Edge of DOC to point A, then decreasing at a linear rate to 5 μA (0.005 ddm) at point B. 5 μA from point B to the ILS reference datum (2162).  Commissioning 1 or 2Annual 1 or 2Routine None 
　
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