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7. TAAs may be modified from the standard size (a) FIG 5-4-6 depicts a TAA without a left
and shape to accommodate operational or ATC re- base leg and right base leg. In this generalized ex-
quirements. Some areas may be eliminated, while the ample, pilots approaching on a bearing TO the IF/IAF
other areas are expanded. The "T" design may be from 271 clockwise to 089 are expected to execute a
modified by the procedure designers where required course reversal because the amount of turn required
by terrain or ATC considerations. For instance, the at the IF/IAF exceeds 90 degrees. The term "NoPT"
"T" design may appear more like a regularly or irreg- will be annotated on the boundary of the TAA icon for
ularly shaped "Y," upside down "L," or an "I." the other portion of the TAA.
TAA with Left and Right
(b) FIG 5-4-7 depicts another TAA modific-
ation that pilots may encounter. In this generalized
example, the left base area and part of the straight-in
area have been eliminated. Pilots operating within the
TAA between 210 clockwise to 360 bearing TO the
IF/IAF are expected to proceed direct to the IF/IAF
and then execute the course reversal in order to prop-
erly align the aircraft for entry onto the intermediate
segment or to avoid an excessive descent rate. Air-
craft operating in areas from 001 clockwise to 090
Base Areas Eliminated
bearing TO the IF/IAF are expected to proceed direct
to the right base IAF and not execute course reversal
maneuver. Aircraft cleared direct the IF/IAF by ATC
in this sector will be expected to accomplish HILTP.
Aircraft operating in areas 091 clockwise to 209 bear-
ing TO the IF/IAF are expected to proceed direct to
the IF/IAF and not execute the course reversal. These
two areas are annotated "NoPT" at the TAA boundary
of the icon in these areas when displayed on the ap-
proach chart's plan view.
Arrival Procedures 5-4-13