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Section 12. PAR Approaches- Terminal5-12-1. GLIDEPATH NOTIFICATION Inform the aircraft when it is approaching glidepath (approximately 10 to 30 seconds before final descent). PHRASEOLOGY- 5-12-2. DECISION HEIGHT (DH) NOTIFICATION Provide the DH to any pilot who requests it. PHRASEOLOGY- 5-12-3. DESCENT INSTRUCTION When an aircraft reaches the point where final descent is to start, instruct it to begin descent. PHRASEOLOGY- 5-12-4. GLIDEPATH AND COURSE INFORMATION a. Issue course guidance and inform the aircraft when it is on glidepath and on course, and frequently inform the aircraft of any deviation from glidepath or course. Transmissions with aircraft on precision final approach should occur approximately every 5 seconds. PHRASEOLOGY- NOTE- b. Issue trend information as required, to indicate target position with respect to the azimuth and elevation cursors and to describe target movement as appropriate corrections are issued. Trend information may be modified by the terms “RAPIDLY” or “SLOWLY,” as appropriate. EXAMPLE- REFERENCE- 5-12-5. DISTANCE FROM TOUCHDOWN Inform the aircraft of its distance from touchdown at least once each mile on final approach. PHRASEOLOGY- 5-12-6. DECISION HEIGHT Inform the aircraft when it reaches the published decision height. PHRASEOLOGY- 5-12-7. POSITION ADVISORIES a. Continue to provide glidepath and course information prescribed in para 5-12-4, Glidepath and Course Information, subparas a and b, until the aircraft passes over threshold. NOTE- b. Inform the aircraft when it is passing over the approach lights. PHRASEOLOGY- c. Inform the aircraft when it is passing over the landing threshold and inform it of its position with respect to the final approach course. PHRASEOLOGY- REFERENCE- 5-12-8. APPROACH GUIDANCE TERMINATION a. Discontinue precision approach guidance when: 1. Requested by the pilot. 2. In your opinion, continuation of a safe approach to the landing threshold is questionable. 3. The aircraft passes over landing threshold. 4. The pilot reports the runway/approach lights in sight and requests to or advises that he/she will proceed visually. NOTE- b. When precision approach guidance is discontinued in accordance with subpara a, advise the aircraft of its position and to proceed visually. PHRASEOLOGY- c. After a pilot has reported the runway/approach lights in sight and requested to or advised that he/she will proceed visually, and has been instructed to proceed visually, all PAR approach procedures must be discontinued. d. Continue to monitor final approach and frequency. Pilots must remain on final controller's frequency until touchdown or otherwise instructed. REFERENCE- 5-12-9. COMMUNICATION TRANSFER Issue communications transfer instructions. PHRASEOLOGY- NOTE- REFERENCE- 5-12-10. ELEVATION FAILURE a. If the elevation portion of PAR equipment fails during a precision approach: 1. Discontinue PAR instructions and tell the aircraft to take over visually or if unable, to execute a missed approach. If the aircraft executes a missed approach, apply subpara 2 below. PHRASEOLOGY- 2. If a surveillance approach, ASR or PAR without glide slope, is established for the same runway, inform the aircraft that a surveillance approach can be given. Use ASR or the azimuth portion of the PAR to conduct the approach and apply Chapter 5, Radar, Section 11, Surveillance Approaches- Terminal. When the PAR azimuth is used, inform the pilot that mileage information will be from touchdown, and at those runways where specific minima have been established for PAR without glideslope, inform the pilot that the PAR azimuth will be used for the approach. EXAMPLE- 2. Descent Instructions: REFERENCE- b. If the elevation portion of the PAR equipment is inoperative before starting a precision approach, apply subpara a2. 5-12-11. SURVEILLANCE UNUSABLE PAR approaches may be conducted when the ASR is unusable provided a nonradar instrument approach will position the aircraft over a navigational aid or DME fix within the precision radar coverage, or an adjacent radar facility can provide a direct radar handoff to the PAR controller. NOTE- |