PPRuNe Forums - View Single Post - Pratica sempre un procedurale sicuro
View Single Post
Old 11th Jan 2009, 11:56
  #15 (permalink)  
N-757PJ
 
Join Date: Jan 2007
Location: ...FL510
Age: 43
Posts: 65
Likes: 0
Received 0 Likes on 0 Posts
Mi sono letto il link, che ho trovato molto interessante e che spiega bene alcune eccezioni tipiche degli USA. In ogni caso, il 5.4.9 parla di "Procedure Turn" e quindi mi pare che ci sia un po' di confusione.

Se non erro, esistono due tipi di procedure:
- le REVERSAL, di cui fanno parte la Procedure Turn e la Base Turn;
- le RACETRACK (tipo biscotto ma che non sono holding).

Detto questo, sono andato in cerca di informazioni ed ho riletto il DOC 8168 ediz. 2006, trovando quanto segue:




3.4 INITIAL APPROACH SEGMENT USING A RACETRACK PROCEDURE
3.4.1 General
Racetrack procedures are used where sufficient distance is not available in a straight segment to accommodate the required loss of altitude and when entry into a reversal procedure is not practical. Racetrack procedures may also be specified as an alternative to reversal procedures to increase operational flexibility.

3.4.2 Shape of a racetrack procedure
The racetrack procedure has the same shape as a holding pattern but with different operating speeds and outbound timing. The inbound track normally becomes the intermediate or final segment of the approach procedure.

3.4.3 Starting point
The racetrack procedure starts at a designated facility or fix.

3.4.4 Entry

3.4.4.1 Entry into a racetrack procedure shall be similar to entry procedures for holding patterns as specified in Part II, Section 4, Chapter 1, 2.1, with the following additional considerations:
I-4-3-4 Procedures — Aircraft Operations — Volume II

a) offset entry from Sector 2 shall limit the time on the 30° offset track to 1 min 30 s. After this time the pilot
should turn to a heading parallel to the outbound track for the remainder of the outbound time. If the outbound time is only 1 min, the time on the 30° offset track shall be 1 min also; and

la mia interpretazione di questo paragrafo č che si parla di come entrare nella procedura, ma ancora non č iniziata …


b) parallel entry shall not return directly to the facility without first intercepting the inbound track (when
proceeding onto the final approach segment).

3.4.4.2 Restricted entry
Where necessary to conserve airspace (or for other reasons), entry may be restricted to specific routes. When so restricted, the entry route(s) shall be specified in the procedure. Examples of restricted entries are shown in Appendix C.
..segue



Il link del documento č: http://dcaa.slv.dk:8000/icaodocs/Doc...05th%20ed..pdf Resto dell’idea che la procedura Race Track č composta da quattro settori (virata out bound, tratto out bound, virata in bound, tratto in bound) e che se riportati in grassetto, debbono essere volati tutti quanti come prescritto. Se trovate altre informazioni vi prego di postarle... non si finisce mai di imparare. Grazie e buona domenica a tutti.
N-757PJ is offline