O Glossário de Piloto / Controlador pode lançar alguma luz sobre a sua pergunta.
A abordagem GPS é o exemplo mais claro de uma correção de abordagem intermediária.
IF/IAWP− Intermediate Fix/Initial Approach Way- point. The waypoint where the final approach course of a T approach meets the crossbar of the T. When designated (in conjunction with a TAA) this waypoint will be used as an IAWP when approaching the airport from certain directions, and as an IFWP when beginning the approach from another IAWP.
INTERMEDIATE APPROACH SEGMENT [ICAO]− That segment of an instrument approach procedure between either the intermediate approach fix and the final approach fix or point, or between the end of a reversal, race track or dead reckoning track procedure and the final approach fix or point, as appropriate.
O Manual do Instrument Flying avisa que “Alistar-se aleatoriamente em uma aproximação em uma correção intermediária não garante a liberação do terreno.”
Em outras abordagens, pode não haver uma correção intermediária, mas o segmento é definido da seguinte maneira:
INTERMEDIATE FIX− The fix that identifies the beginning of the intermediate approach segment of an instrument approach procedure. The fix is not normally identified on the instrument approach chart as an intermediate fix (IF).
INITIAL APPROACH SEGMENT [ICAO]− That segment of an instrument approach procedure between the initial approach fix and the intermediate approach fix or, where applicable, the final approach fix or point.
O Manual do Instrument Flying também fala sobre correções intermediárias onde às vezes há uma Correção Intermediária:
Procedimento de lágrima
When a teardrop procedure turn is depicted and a course reversal is required, unless otherwise authorized by ATC, this type of procedure must be executed. [Figure 1-15] The teardrop procedure consists of departure from an IAF on the published outbound course followed by a turn toward and intercepting the inbound course at or prior to the intermediate fix or point. Its purpose is to permit an aircraft to reverse direction and lose considerable altitude within reasonably limited airspace. Where no fix is available to mark the beginning of the intermediate segment, it shall be assumed to commence at a point 10 NM prior to the FAF. When the facility is located on the airport, an aircraft is considered to be on final approach upon completion of the penetration turn. However, the final approach segment begins on the final approach course 10 NM from the facility.
Retenção em turnos de procedimento
A holding pattern in lieu of a procedure turn may be specified for course reversal in some procedures. In such cases, the holding pattern is established over an intermediate fix (IF) or a FAF.
