02.04.2007, 14:34
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#21
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B744, B777, MD-11
Registriert seit: 11.03.2002
Ort: vicinity IRBIR
Beiträge: 3.420
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Hi Sandra, ein Racetrack ist nicht gleich ein Standardholdingpattern.
Ich zitiere mal die PAN-OPS (DOC 8186)
Zitat:
3.2.3 Racetrack procedure
3.2.3.1 A racetrack procedure consists of:
a) a turn from the inbound track through 180° from overhead the facility or fix on to the outbound track, for 1, 2 or
3 minutes; followed by
b) a 180° turn in the same direction to return to the inbound track (see Figure I-4-3-1 D).
As an alternative to timing, the outbound leg may be limited by a DME distance or intersecting radial/bearing.
3.2.3.2 Entry into a racetrack procedure
Normally a racetrack procedure is used when aircraft arrive overhead the fix from various directions. In these cases,
aircraft are expected to enter the procedure in a manner similar to that prescribed for a holding procedure entry with the
following considerations:
a) offset entry from Sector 2 shall limit the time on the 30° offset track to 1 min 30 s, after which the pilot is
expected to 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;
b) parallel entry shall not return directly to the facility without first intercepting the inbound track when
proceeding to the final segment of the approach procedure; and
c) all manoeuvring shall be done in so far as possible on the manoeuvring side of the inbound track.
Note.— 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. They may also be
specified as alternatives to reversal procedures to increase operational flexibility (in this case, they are not necessarily
published separately).
3.3 FLIGHT PROCEDURES FOR RACETRACK AND REVERSAL PROCEDURES
3.3.1 Entry
3.3.1.1 Unless the procedure specifies particular entry restrictions, reversal procedures shall be entered from a
track within ±30° of the outbound track of the reversal procedure. However, for base turns, where the ±30° direct entry
sector does not include the reciprocal of the inbound track, the entry sector is expanded to include it.
3.3.1.2 For racetrack procedures, entry shall be as specified in 3.2.3.2, “Entry into a racetrack procedure”, unless
other restrictions are specified. See Figures I-4-3-2, I-4-3-3 and I-4-3-4.
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Servus!
By the way, God doesn't bless individual nations.
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